The sandbox is to be only partially filled with sand. What is the total amount of sand needed to fill this sandbox so that the sand is 1 foot deep?

Question

Answers:

45 cubic feet

68 cubic feet

78 cubic feet

117 cubic feet

I'm missing something, not getting the right answers What am I doing wrong?

 

Answer 1

All we need is the base area of the sandbox, which is made up of two rectangles: 8×8.5=68 and 4×2.5=10.

So the areas in total are 68+10=78 sq ft. The amount of sound is base area times depth of sand=78×1=78 cubic feet. 3rd answer.

Answer 2

117 cubic feet