Question

How much sand do you need to add to 3.2m^3 of soil with 40% sand in order to make a soil with 60% sand

Answer 1

`1.6m^3` sand is to be added to make sand percentage
`60\%`

Explanation:

From the question we are told that:

Total soil
`N=3.2m^3`

Initial sand percentage
`S_1=40\%`

Final sand percentage
`s_2=60\%`

Generally the sand and other particles division is mathematically given by

`40\% of 3,2=1.28`

and

`60\% of 3.2=1.92`

Generally what will make 60\% of 3.2 40\% is mathematically given by

`x=1.92*0.4\\x=4.8`

Generally the sand to be added is mathematically given by

`4.8sand-3.2sand =1.6m^3`

Therefore

`1.6m^3` sand is to be added to make sand percentage
`60\%`