A plumber is laying pipe. His assistant digs a trench in roughly the shape of a rectangular solid measuring 150 ft. in length, 9 inches deep along both sides, and 12 inches wide at the top and bottom. How many cubic feet of earth did he remove (to the nearest tenth)?

cubic feet

Question

A plumber is laying pipe. His assistant digs a trench in roughly the shape of a rectangular solid measuring 150 ft. in length, 9 inches deep along both sides, and 12 inches wide at the top and bottom. How many cubic feet of earth did he remove (to the nearest tenth)?

    cubic feet

anonymous · Answer

v=lwh

zepdrix · Answer

Yes that sounds right! :)
Since they want the answer in FEET, we need to convert our units to feet.
A few of the side lengths are given in inches, hmmm. :)

biffo · Answer

Slightly strangely worded but you'd be looking at 150 x 1 x 3/4. Which is 112.5, if I can still  do those things in my head.

zepdrix · Answer

|dw:1349285711827:dw|
Are you ok with converting units?
if not, maybe this will help.