Volume & Surface Area (Cambridge (CIE) IGCSE Maths: Extended)

A solid metal cuboid has a volume of 600cm³.

The base of the cuboid is 10 cm by 12 cm.
Calculate the height of the cuboid.

.......................................... cm

The solid metal cuboid is melted and made into 1120 spheres, each with radius 0.45cm.

Find the volume of metal not used in making these spheres.

......................................... cm³

Water flows at a speed of 20 cm/s along a rectangular channel into a lake.
The width of the channel is 15 cm.
The depth of the water is 2.5 cm.  

Calculate the amount of water that flows from the channel into the lake in 1 hour.
Give your answer in litres.  

 ........................................ litres

Water from Manjeet’s shower flows at a rate of 12 litres per minute.
The water from the shower flows into a tank that is a cuboid of length 90 cm and width 75 cm.

Calculate the increase in the level of water in the tank when the shower is used for 7 minutes.

............................................ cm

i) Calculate the external curved surface area of a cylinder with radius 8 m and height 19 m.

............................................... m² [2]

ii) This surface is painted at a cost of $0.85 per square metre.

Calculate the cost of painting this surface.

$ ................................................... [2]

The lake behind a dam has an area of 55 hectares.
When the gates in the dam are open, water flows out at a rate of 75 000 litres per second.

i) Show that 90 million litres of water flows out in 20 minutes.  

[1]

ii) Beneath the surface, the lake has vertical sides.

Calculate the drop in the water level of the lake when the gates are open for 20 minutes.
Give your answer in centimetres.
[1 hectare = 10⁴ m², 1000 litres = 1 m³]

.......................................... cm [3]

Water flows through a cylindrical pipe at a speed of 8 cm/s.
The radius of the circular cross-section is 1.5 cm and the pipe is always completely full of water.

Calculate the amount of water that flows through the pipe in 1 hour.
Give your answer in litres.

....................................... litres

The cross-section of a prism is an equilateral triangle of side 6cm.
The length of the prism is 20 cm.

Calculate the total surface area of the prism.

......................................... cm²

A pipe is completely full of water.
Water flows through the pipe at a speed of 1.2 m/s into a tank. The cross-section of the pipe has an area of 6 cm².

Calculate the number of litres of water flowing into the tank in 1 hour.

.......................................... litres

A cone with height 14.8 cm has volume 275 cm³.  

Calculate the radius of the cone.
[The volume, , of a cone with radius  and height  is .]  

............................................... cm

A pipe is full of water.
The cross-section of the pipe is a circle, radius 2.6 cm.
Water flows through the pipe into a tank at a speed of 12 centimetres per second.  

Calculate the number of litres that flow into the tank in one hour.  

............................................ litres

The diagram shows a sector of a circle with centre , radius 8 cm and sector angle 165°.
The surface area of a sphere is the same as the area of the sector.

Calculate the radius of the sphere.
[The surface area, , of a sphere with radius is  ]

............................................ cm

A cone is made from the sector by joining to .

i) Calculate the radius, , of the cone.

........................................... cm [2]

ii) Calculate the volume of the cone.

[The volume, , of a cone with radius and height is   ]

.......................................... cm³ [4]

Show that the volume of a metal sphere of radius 15 cm is 14 140 cm³, correct to 4 significant figures.

[The volume, , of a sphere with radius  is .]

i) The sphere is placed inside an empty cylindrical tank of radius 25 cm and height 60 cm.
The tank is filled with water.

Calculate the volume of water needed to fill the tank.  

......................................... cm³ [3]

ii) The sphere is removed from the tank.

Calculate the depth, , of water in the tank.  

 ......................................... cm [2]

A solid metal sphere with radius 6 cm is melted down and all of the metal is used to make a solid cone with radius 8 cm and height cm.

i) Show that .
[The volume, , of a sphere with radius is .]
[The volume, , of a cone with radius and height is .]

[2]

ii) Calculate the slant height of the cone.

.............................................. cm [2]

iii) Calculate the curved surface area of the cone.
[The curved surface area, , of a cone with radius and slant height is .]

............................................. cm² [1]

The diagram shows a prism ABCDEF.
The cross-section is a right-angled triangle BCD.
BD = 10 cm, BC = 5.2 cm and ED = 18 cm.

Work out the volume of the prism.  

............................................. cm³

The diagram shows a solid metal prism.
The volume of the prism is 2187 cm³.
The larger prism is melted down into a sphere.

Calculate the radius of the sphere.
[The volume, , of a sphere with radius is .]  

.............................................. cm

The diagram shows the surface of a garden pond, made from a rectangle and two semicircles.
The rectangle measures 3 m by 1.2 m.

Calculate the area of this surface.  

...............................................m²

The pond is a prism and the water in the pond has a depth of 20 cm.

Calculate the number of litres of water in the pond.  

........................................... litres

After a rainfall, the number of litres of water in the pond is 1007.

Calculate the increase in the depth of water in the pond.
Give your answer in centimetres.  

.............................................. cm

A sphere has radius cm. The volume of the sphere is 1000 cm³.  

Calculate the value of .
[The volume, , of a sphere with radius  is .]   

..........................................................

The diagram shows a prism with a right-angled triangle as its cross-section. The volume of the prism is 1000 cm³.  

Calculate the value of .  

...................................................

A gold model is made.
This model is a prism with a cross-section of area 77.44 cm².  

This gold model is 15 mm thick.
One cubic centimetre of gold has a mass of 19 grams.  

Calculate the mass of the gold model in kilograms.  

.............................................. kg

The diagram shows a prism with length 18 cm and volume 253.8 cm³.
The cross-section of the prism is a right-angled triangle with base 6 cm and height  cm.

Show that the value of  is 4.7 .

Calculate the total surface area of the prism.  

........................................ cm²

The diagram shows a solid cone.
The radius is 8 cm and the slant height is 17 cm.

i) Calculate the curved surface area of the cone.
[The curved surface area, , of a cone with radius and slant height  is .]  

........................................... cm² [2]

ii) Calculate the volume of the cone.
[The volume, , of a cone with radius  and height is .]

........................................... cm³ [4]

i) The cone is made of wood and 1 cm³ of the wood has a mass of 0.8 g.  

Calculate the mass of the cone.    

............................................... g [1]

ii) The cone is placed in a box.
The total mass of the cone and the box is 1.2 kg.

Calculate the mass of the box.
Give your answer in grams.  

............................................... g [1]

A solid hemisphere has volume 230 cm³.

Calculate the radius of the hemisphere.
[The volume, , of a sphere with radius is .]

.......................................... cm

A solid cylinder with radius 1.6 cm is attached to the hemisphere to make a toy.

The total volume of the toy is 300 cm³.

Calculate the height of the cylinder.

.......................................... cm

The diagram shows a prism with a rectangular base, ABFE.
The cross-section, ABCD, is a trapezium with AD = BC.
AB = 8 cm, GH = 5 cm, BF = 12 cm and angle ABC = 70°.

Calculate the total surface area of the prism.

   .......................................... cm²

A cylinder with radius 6 cm and height  cm has the same volume as a sphere with radius 4.5 cm.  

Find the value of .
[The volume, , of a sphere with radius  is .]  

................................................

A solid metal cube of side 20 cm is melted down and made into 40 solid spheres, each of radius  cm.  

Find the value of .
[The volume, , of a sphere with radius  is .]  

................................................

A solid metal cone has radius 1.65 cm and slant height 4.70 cm.

Calculate the total surface area of the cone.
[The curved surface area, , of a cone with radius  and slant height  is .]

.......................................... cm²

Calculate the volume of the cone.
[The volume, , of a cone with radius  and height  is .]

.......................................... cm³

A metal sphere with radius 5 cm is melted down to make cones identical to this one.

Calculate the number of complete identical cones that are made.
[The volume, , of a sphere with radius  is .]

A cone has radius cm and slant height  cm. The volume of the cone is 1000 cm³.  

Calculate the value of .
[The volume, , of a cone with radius  and height  is .]   

....................................................

The volume of a solid metal sphere is .
Calculate the radius of the sphere.
[The volume, , of a sphere with radius  is .]   

......................................... cm

The metal sphere is placed in an empty tank.
The tank is a cylinder with radius , standing on its circular base.
Water is poured into the tank to a depth of .  

Calculate the number of litres of water needed.  

...................................... litres

The diagram shows a hemispherical bowl of radius 5.6 cm and a cylindrical tin of height 10 cm.

Show that the volume of the bowl is 368 cm³, correct to the nearest cm³.
[The volume, , of a sphere with radius is . ]

The tin is completely full of soup.
When all the soup is poured into the empty bowl, 80% of the volume of the bowl is filled.  

Calculate the radius of the tin.  

......................................... cm

The diagram shows a cone with radius 1.75 cm and height 6 cm. 

Calculate the total surface area of the cone.
[The curved surface area, , of a cone with radius and slant height is .]   

........................................ cm²

The cone contains salt to a depth of 4.5 cm.
The top layer of the salt forms a circle that is parallel to the base of the cone.

Show that the volume of the salt inside the cone is 18.9 cm³, correct to 1 decimal place.
[The volume, , of a cone with radius and height is . ]  

The salt is removed from the cone at a constant rate of 200 mm³ per second.  

Calculate the time taken for the cone to be completely emptied.
Give your answer in seconds, correct to the nearest second.  

............................................. s

The diagram shows a solid prism with length 15.2 cm. The cross-section of this prism is a regular hexagon with side 7 cm.

Calculate the volume of the prism.  

 ......................................... cm³

Calculate the total surface area of the prism.  

 ......................................... cm²

A solid metal prism with volume 500 cm³ is melted and made into 6 identical spheres.  

Calculate the radius of each sphere.
[The volume, , of a sphere with radius  is .]  

........................................... cm