Question

one grain of this sand approximately weighs 7 x 10 to the power of -5 grams, how many grains of sand are there in 6300 kg of sand, give your answer in standard from

Answer 1

"
`9* 10^(10)`" or "90000000000" grains are there in 6300 kg of sand

Explanation:

Given

1 grain sand weighs = 7
`*`
`10^(-5)`

Let x be the number of grain in 6300 kg of sand

Solution:

x=
`(6300 * 10^3)/(7*10^(-5))= 900*10^3*10^5=9*10^(10)`

"
`9* 10^(10)`" or "90000000000" grains are there in 6300 kg of sand