Question

Find the lateral curved surface area of a cylinderical petrol storage tank that is 4.2 m in diameter and 4.5 m high. How much steel was actually used, if 1/12 of steel actually used was wasted in making the closed tank?

Answer 1

Height (h) cylindrical tank = 4.5 m

Radius (r) of circular end of cylindrical tank = 4.2/2 m = 2.1 m

Let A m² steel sheet be actually used in making the tank.

Thus, 95.04 m² steel was used in actual while making the tank.