A petrol tank is a cylinder of base diameter 21 cm and length 18 cm fitted with conical ends each of axis length 9 cm. Determine the capacity of the tank.
Diameter =21 cm
∴ Radius, r =10.5 cm
Length of the cylindrical part, l =18 cm
Height of the conical part, h = 9 cm
Volume of the tank = Volume of the cylindrical part + 2 × Volume of the conical part
= (22/7) × 10.5 × 10.5 × 24
= 8316 cm3
9