ConceptSurface Area of a Right Circular Cylinder

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#### Question

Find

(i) 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.

(ii) How much steel was actually used, if 1/12 of the steel actually used was wasted in making the tank.

`["Assume "pi=22/7]`

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#### Reference Material

Solution for concept: Surface Area of a Right Circular Cylinder. For the course CBSE