Question

The volume of cylendrical pipe is 784 cm3its length is 14 cm and its external radius is 9 cm find its thickness

Answer 1

hey! dear friend

volume of the metallic cylindrical pipe = 748
length of the cylindrical pipe h =14 cm
external radius of the pipe R = 9 cm
let the internal radius of the cylindrical pipe be r cm.
therefore the volume of the metallic pipe =π(R^2-r^2)h
therefore
22/7(9*9-r*r)14=748
81-r*r=17
r*r=64
r=8
thickness of the metallic pipe = R-r=9-8=1 cm

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