Question 26928
Ah yes, work at the ol' aluminum cylinder plant. Anyway, the way to solve this problem is to know the formula for volume of a cylinder. It is length times the area of its base, and it's base is given by the area of a circle, pi*r^2.
Since a diameter (3 foot) is twice your radius, your formula for volume yields:
{{{pi*(d/2)^2*h=pi*(1.5ft)^2*5ft=35.3428ft^3}}}
Volume times density equals weight:
{{{35.3428ft^3*165(lbs/ft^3)=5831.57lbs}}}