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 = 4.5 m
Radius (r) of the circular end of cylindrical tank = (4.2/2)m = 2.1m
Lateral or curved surface area of tank = 2πrh
= (44 × 0.3 × 4.5) m2
= 59.4 m2
Therefore, CSA of tank is 59.4 m2.
Concept: Surface Area of Cylinder
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