An iron pipe is 22 cm long and its exterior diameter is 8 cm. If the thickness of the pipe is 2 cm and iron weigh 9g/cm cube, find the weight of the pipe.
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Answer:
3.696kg
Step-by-step explanation:
In this type of question, we need to subtract external radius and internal radius to get the answer using the volume formula as the pipe is hollow. Oh! line become a bit complicated, sorry for that, lets solve it.
External radius = 4 cm
Internal radius = 3 cm [because thickness of pipe is 1 cm]
Volume of iron =πr2h=227∗[42−32]∗21cm3=227∗1∗21cm3=462cm3
Weight of iron = 462*8 = 3696 gm
= 3.696 kg
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