An iron pipe is 21 m long and it's exterior diameter is 8 cm if the thickness of pipe is 1 cm and iron weight is 8g/cubic cm find the weight of pipe
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volume of a cylinder=1/3 *22/7*height*(R^2-r^2)
so,
volume=1/3*22/7*21*(8^2-1^2)
=63*22
=1386 cm^3
1 cm^3 weighs 8g
so,
1386 cm^3 will weigh=1386/8
=173.25g
so weight of the pipe=173.25g
so,
volume=1/3*22/7*21*(8^2-1^2)
=63*22
=1386 cm^3
1 cm^3 weighs 8g
so,
1386 cm^3 will weigh=1386/8
=173.25g
so weight of the pipe=173.25g
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