Question

The picture below shows a petrol tank.

How many litres does it hold?

Answer 1

Radius of the hemisphere = 1 m

Radius of the cylinder = 1 m

Height of the cylinder = 6 m

Volume of one hemisphere =

Volume of the two hemispheres = 2 × 2.1 m³ = 4.2 m³

Volume of the cylinder = Base area × height

= π × (1 m)² × 6 m

= 6 × 3.14 m³

= 18.84 m³

Volume of the petrol tank = Volume of the two hemispheres + Volume of the cylinder

= (4.2 + 18.84) m³

= 23.04 m³

We know that 1 m³ = 1000 L

⇒ 23.04 m³ = 1000 × 23.04 L = 23040 L

Therefore, the petrol tank can hold 23040 litres of petrol.