8. Find the volume of metal used in making a l m pipe of external radius 3 cm and width 0.5 cm.
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Answer:
metal boy what questions ask correct
Answered by
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Answer:
Step-by-step explanation:
Given that the external and internal radius of pipe is 4 cm and 0.5 cm and length is 10 cm
Then External volume of pipe =πr 2
h=2π(4) 2
×10=π×16×10=160π sq cm
Or internal volume of pipe =πr2
h=2π(3) 2
×10=π×19×10=90π sq cm
Then volume of metal pipe=160π−90π=70π=70×
22 /7
=220cm^2
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