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A child’s sandbox is 1.5 m wide, 1.5 m long and 75 cm deep. If there are on average 55 grains of sand per mm3 , how many grains of sand are there in the sandbox?

 Aug 27, 2015

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 #1
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A child’s sandbox is 1.5 m wide, 1.5 m long and 75 cm deep. If there are on average 55 grains of sand per mm3 , how many grains of sand are there in the sandbox

Convert the sides to mm,

1.5 x1000=1500mm

75cm x10=750

1500 x1500 x 750=1,687,500,000 mm^3 (This is the volume of the box in cubic mm)

Then 1,687,500,000 x55=92,812,500,000 grains of sand in the box. Phew!!!!

 Aug 27, 2015
 #1
avatar
+5
Best Answer

A child’s sandbox is 1.5 m wide, 1.5 m long and 75 cm deep. If there are on average 55 grains of sand per mm3 , how many grains of sand are there in the sandbox

Convert the sides to mm,

1.5 x1000=1500mm

75cm x10=750

1500 x1500 x 750=1,687,500,000 mm^3 (This is the volume of the box in cubic mm)

Then 1,687,500,000 x55=92,812,500,000 grains of sand in the box. Phew!!!!

Guest Aug 27, 2015
 #2
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Thanks anon - that is a lot of sand grains :))

 Aug 27, 2015

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