Q14 of 45 Page 11

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 =

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