# A hellow iron Pipe, which is 14cm long and has its external diameter 10cm. If the thickness of the pipe is 2cm and iron weighs 10g/cm3, find the weight of the pipe?

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R(outer radius)=10cm

r (inner radius)=10-2=8cm

that r^2 means r raise to power 2

volume of pipe= π R^2 h - π r^2 h

=πh(R^2 - r^2)

=22/7 * 14(10^2 - 8^2)

=22*2(100-64)

=44(36)

=1584 cm^3

density=10g/cm^3

mass/volume=10

mass=10*volume

mass=10*1584

mass=15840g

hope it will help u pls mark this as brainliest answer