The lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high.
Height(h) of cylindrical tank =4.5m
Radius(r) of the circular end of cylindrical tank =(4.22)m=2.1m
Curved surface area of tank =2πrh
=(2×227×2.1×4.5)m2
=(2×227×2110×4510)m2
=(22×35×95)m2
=59.4m2.