derive π(R²-r²)h
wrong ans=report
correct answer= brainliest and thanks
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How to calculate the volume of metal in a hollow pipe
Radius of outside circle of pipe = R
Radius of inner circle of pipe = r
Height of the pipe = h
volume of hollow = π*r²*h
volume of whole pipe= π*R²*h
volume of pipe= πR²h-πr²h
= πh(R²-r²)
= π*(R²-r²)*h Ans.
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