The volume of a metallic cylindrical pipe is 748 cm^3. Its length is 14cm and its external radius is 9 cm.Find its thickness
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V = π r² h
748 = 22/7 x r² x 14
r² = (748 x 7)/(22 x 14) = 17
r = √17 = 4.12
R = 9
Thickness = 9 - 4.12 = 4.88
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