Posted by **jean** on Wednesday, June 8, 2011 at 10:00am.

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.

- geometry(?) -
**PsyDAG**, Thursday, June 9, 2011 at 10:19am
More information needed. How big is the base of the box?

- geometry -
**tchrwill**, Saturday, June 11, 2011 at 9:33am
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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