SOLUTION: If a lead pipe 1/4 in. thick has an inner diameter of 1 1/2 in., find the number of cubic inches of a lead in a piece of pipe 10 ft. long.

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Question 850353: If a lead pipe 1/4 in. thick has an inner diameter of 1 1/2 in., find the number of cubic inches of a lead in a piece of pipe 10 ft. long.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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If a lead pipe 1/4 in. thick has an inner diameter of 1 1/2 in.,
find the number of cubic inches of a lead in a piece of pipe 10 ft. long.
:
convert 10 ft to inches
12 * 10 = 120"
Find the inner radius:
1%2F2 * 3%2F2 = 3%2F4 (.75")
The overall radius of the pipe, add 1/4 inch:
.75 + .25 = 1"
:
Find volume of the lead
lead vol (V) = Overall volume - inner volume
V = pi%2A1%5E2%2A120 - pi.75%5E2%2A120
V = 377 - 112 = 265 cu/in of lead