Question 129117
A water main for a street is being laid using particular kind of pipe that comes in either 18-foot sections or 20-foot sections. The designer has determined that the water main would require 14 fewer sections of 20-foot pipe than if 18-foot sections were used. Find the total length of the water main.
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Let the total length of the water main be x feet.
# of 18 ft - # of 20 ft = 14
x/18 - x/20 = 14
(20x-18x)/20*18 = 14
2x = 20*18*14
x = 10*18*14
x = 2520 ft.
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Cheers,
Stan H.