math
posted by robert .
Find the weight of a right rectangular prism with length 13 ft, width 6 ft, and height 2.5 ft if the contents weigh 0.02 pounds per cubic inch.
I think it's 31.2 but I'm having doubts. Can you help me?

The volume is 13 x 6 x 2.5 cubic feet
= 195 cubic feet
1 cubic foot = 1728 cubic inches, so..
your volume is 336960 cubic inches, which at .02 lbs per cubic inch
= 6739.2 lbs