Question

A trough is 8 meters long, 3 meters wide, and 5 meters deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 5 meters, and base, on top, of length 3 meters). The trough is full of water (density ). Find the amount of work in joules required to empty the trough by pumping the water over the top. (Note: Use as the acceleration due to gravity.)

Answer 1

need rules of physics here.

volume of water if trough is full
= (1/2)(3)(5)(8)
= 60 cubic metres

from here on it is physics

Answer 2

I keep getting 122500 as an answer and my online homework keeps saying that it's wrong. I've tried other ways but it's still incorrect