Q: How many square feet of sand are needed to fill a 10' by 3' by 18 sandbox?

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32 cubic ft.

1485

12.5 cubic feet

The answer will depend on the depth to which the area is covered.

You would need 8.

Related questions

18ft³

72 cubic feet

32 cubic ft.

It will take 72 sq. ft. of sand. Or 2.66 sq. yds. That will fill the box even.

Another 53.75 square feet of tile would be needed.

1485

12.5 cubic feet

The answer will depend on the depth to which the area is covered.

You would need 8.

Volume of sand required = 7 ft * 7 ft * 1/6 ft = 49/6 cubic feet = 8.166... cubic ft.

All you have to do is find the maximum volume of your sandbox. To do this, multiply the length (6 ft.) by the width (6 ft.) by the depth (10 ft.). 6 x 6 x 10 = 360 cubic feet This is if you want to fill the sandbox to the brim. If you want something about half the depth so that the sand isn't falling out everywhere, you just multiply: 6 x 6 x 5 = 180 cubic feet

26928 pebbles for the minimum depth.