<PRE><B>Question 1058956</B>
Allowing 5% for waste, determine amount in feet of lead pipe 2 in. outer diameter, 1/4 in. thick from a ton of lead.  A cu. ft. of lead weighs 710 lbs. / cu. ft. 

A pipe is considered a cylinder. 

.95 * 2000 = 1900 lbs. (amt. of material). 


Area of circle; pi ^ r*2 

Outer; 3.1416 * 1 * 1 = 3.1416 sq. in. 
Inner; 3.1416 * .75 * .75 = 1.76 sq. in. 

3.1416 - 1.76 = 1.38 sq. in. (area of end). 


3.1416 * .39 * .39 * h = .4778h 
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Cross-sectional area (CSA) = pi*(1^2 - 0.75^2) = 1.3745 sq inches
Volume of pipe = CSA*length
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2000 lbs/710 lb/cu ft = 2.8169 cu ft of Pb
-5% = 0.95*2.8169 = 2.676 cu ft
2.676*12*12*12 = 4624.225 cu inches
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Vol of pipe = CSA*length
L = 4624.225/1.3745 =~ 3364.3 inches
=~ 280 feet
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