HELP PLEASE? =)
A sandpit in the shape of a rectangular prism has length 7 feet, width 5 feet, and height 1.75 feet. It is filled to the brim with sand. Joe puts this sand into a second sandpit having the same shape but a larger base. He needs 17.5 cubic feet of sand to fill the extra space inside the second sandpit.

If the height of the two sandpits is the same, what are the dimensions of the base of the second sandpit?
Answer

5 feet x 2 feet

10 feet x 7 feet

9 feet x 5 feet

20 feet x 25 feet

Question

HELP PLEASE? =)
A sandpit in the shape of a rectangular prism has length 7 feet, width 5 feet, and height 1.75 feet. It is filled to the brim with sand.  Joe puts this sand into a second sandpit having the same shape but a larger base.  He needs 17.5 cubic feet of sand to fill the extra space inside the second sandpit. 

If the height of the two sandpits is the same, what are the dimensions of the base of the second sandpit?
Answer
		
5 feet x 2 feet
		
10 feet x 7 feet
		
9 feet x 5 feet
		
20 feet x 25 feet

asylum15 · Answer

The dimensions of the first sandpit are 7 x 5 = base I believe.

35 feet.

So the answer MUST be > than that.

anonymous · Answer

mmk so that eliminates the first option what steps do i take next to narrow it down to my answer?

asylum15 · Answer

Ok, the smaller pit used 35x1.75ft^3

The large pit used all of that but an extra 17.5 right? (10x1.75ft^3)

There fore 35x1.75 + 10x1.75 = 45x1.75

The answer is 9feet x 5feet.

:)

anonymous · Answer

gotcha! thank-you tons! =)