Question

A metal pipe 63 cm long has an inner diameter 6 cm and outer diameter 7 cm. If the metal weight 7,5 g per cm^3, find the weight of the metal pipe.
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Answer 1

Answer:

A/Q,Volume of the metal pipe=pi×h(r^2-r•^2)

=22/7×63{(7/2)^2-9}

=22×9{(49/4)-9}

=11×9×13/2

=643.5 cm cube

Now,Weight of the metal pipe in 1 cube=7.5g

=In 643.5 cm cube,weight=(643.5×7)g

=4826.25g

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