Q39. The volume of metallic cylindrical pipe 2112cms length is 25 cm and its external radius is 9 cm. Find its thicknes
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Step-by-step explanation:
volume of cylindrical pipe=2112cm^3
πr^2h=2112cm^3
22/7xrxrx25=2112
r^2=(2112x7)/22x25
r^2=26.88
r=√26.88
r=5.18
thickness =9-5.18
thickness=3.82
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