formula of total surface area of hollow pipes
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The total surface area of a hollow cylinder is 2π ( r1 + r2 )( r2 - r1 +h), where, r1 is inner radius, r2 is outer radius and h is height.
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Answer:
Step-by-step explanation:
Hollow pipe is a cylinder and since it has no base or top surface . So its T.S.A will= its C.S.A i.e. =2x22/7xrxh
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