An iron pipe is 42cm long and it's exterior radius is 4cm. If the thickness of the pipe is 1cm and iron weighs 100gram per cm³,find the weight of the pipe
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Answer:
92.4kg
Step-by-step explanation:
h = 42cm, external radius(R) = 4cm, internal radius(r) = 3cm______(given)
volume of the iron pipe = πh (R²-r²)
=22*42(4²-3²)/7
=22*42*7/7
=924 cm³
weight is 100g/cm³
so, 924cm³*100g/cm³
= 92400g
=92.4kg
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