Question 1161568
If this is cut open, the pipe becomes a rectangle x in long and 2pi*2 in wide (the circumference of a circle with radius 2 inches, and 1/4 " thick.
This is x*(1/4)*4 pi or x*pi cubic inches. One ft of pipe is 12 π in^3


Lead is 710 lb per cubic foot and 1900 lbs is available or 2.676 ft^3 of lead. dividing 1900 lbs/710 lb/ft^3
the pipe uses pi*x cubic inches of lead, or pi*x/1728 ft^3 of lead, since (12 inches)^3=1728 in^3=1 ft^3


12 π in^3* 1 ft^3/1728 in^3=0.02817 ft^3 of lead per foot length. Note, we have ft^3 of lead and ft as a unit of pipe length
There are 2.676 ft^3 of lead available. divide that by 0.02817 ft^3 lead/foot of pipe and units will be feet of pipe.
Rounding at the end, it is 108.77 feet of pipe or 109 feet.