An iron pipe is 21cm long and its exterior diameter is 8cm. If the thickness of the pipe is 1cm and iron weighs 8g/cm3. Find the weight of the pipe.
The external radius of the pipe = 4cm The internal radius of the pipe = (4 - 1) cm = 3cmThe external volume  The internal volume  The volume of the metal = external volume - internal volume  The weight of the pipe =   |  |
14