Question

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?

5 feet x 2 feet

10 feet x 7 feet

9 feet x 5 feet

20 feet x 25 feet

Answer 1

First, i'd calculate the volume of the first sand pit

Answer 2

How do I do that?

Answer 3

@RadEn @rachelfreak123

Answer 4

Volume of a rectangular prism = length * width * height

Answer 5

7*5*1.75 = 61.25

Answer 6

okay you need to add 17.5 cubic feet to fill the second sandpit. So what's the volume of the second pit?

Answer 7

That's where I get confused ;/

Answer 8

All right ill draw it. gimme a sec

Answer 9

Okay,
but im confused