rubyoldknowro21 rubyoldknowro21

15-03-2017
Mathematics

contestada

How many grains of sand are there in 7200kg of sand?

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charles63 charles63

15-03-2017

Hello,

We can say that a grain of sand weighs 0.0006g.

7200kg=7200000g

7200000/0.0006=7.2*10^(6)/6*10(-4)=1.2*10^(10)

So, you have 12000000000 (or 1.2*10^(10)) grain of sand in 7200kg of sand.

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