geometry
posted by jean .
A box is filled with 6 cans of tennis balls. If the empty space was filled with sand, how much sand will be needed to fill the box?
Each can of tennis balls has a radius of 2 in.
Height of box is 12in.

More information needed. How big is the base of the box?

Packed in a single row of 6 cans or a double row of 3 cane each row, 1 x 6 or 2 x 3, the box volume is the same; 4x24x12 = 1152 cub.in. or 8x12x12 = 1152 cub.in.
The volume of the cans is 3.14(2)^2(12)6 = 904.778 cub.in.
THe sand is therefore the difference.
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