The thickness of a metallic pipe is 1cm. Its inner diameter is 12cm. what is the volume of metal required for making a pipe of length 1m or 100cm
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Required volume of metal = volume of full pipe - volume of inner cylinder (as it is hollow)
Diameter of pipe = 12
=> radius of pipe = R = 6cm
Radius of the whole pipe=6+1=7cm
( since 1cm is given to be the thickness )
Length of pipe = 100cm
=> volume of metal = pi * R^2 * h - pi * r^2 * h
= pi * h (R^2 - r^2)
= (22/7) * 100 * (7^2 - 6^2)
= 4085.71 cm^3
Required volume of metal = volume of full pipe - volume of inner cylinder (as it is hollow)
Diameter of pipe = 12
=> radius of pipe = R = 6cm
Radius of the whole pipe=6+1=7cm
( since 1cm is given to be the thickness )
Length of pipe = 100cm
=> volume of metal = pi * R^2 * h - pi * r^2 * h
= pi * h (R^2 - r^2)
= (22/7) * 100 * (7^2 - 6^2)
= 4085.71 cm^3
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