Question

A metallic pipe is 0.7 cm thick . inner radius of the pipe is 3.5 cm and length is 5 dm .find its total surface area.

Answer 1

Answer:

The total surface area of a hollow cylinder is 2π ( r1 + r2 )( r2 - r1 +h), where, r1 is inner radius of cylinder, r2 is outer radius of cylinder and h is height of cylinder

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