Question

The radius of the base of a cylindrical tank is 0.4 m and height is 0.8 m. How many litres of oil will the tank hold?
(π = 3.14, 1 litre = 1000 cu cm)

Answer 1

Radius of cylindrical tank (r) = 0.4 m
Height of cylindrical tank (h) = 0.8 m
Volume of cylindrical tank = πr²h
= 3.14 × 0.4 × 0.4 × 0.8
= 0.40192 cu m
= 401920 cu cm (1m³ = 1000000 cm³)
$$\begin{gathered} =\frac{401920}{1000}\mathrm{litres}\left(1000\mathrm{cu}\mathrm{cm}=1\mathrm{litre}\right) \\ =401.92\mathrm{litres} \end{gathered}$$

So, the tank will hold 401.92 litres of oil.