Question

A mixture of concrete is made up of sand and cement in the ratio of 5:3.How many cubic centimeters of sand is needed to make 160 cubic centimeters of concrete mix?

Answer 1

Answer:
`100\ cm^3`

Explanation:

Given

The ratio of mixture of sand and cement is 5:3

If the total volume of mixture is
`160\ cm^3`

Suppose there is 5x and 3x cubic centimeter of sand and cement respectively i.e.

`\Rightarrow 5x+3x=160\\\Rightarrow 8x=160\\\Rightarrow x=20\ cm^3`

Sand
`5x=5* 20=100\ cm^3`

So, there is
`100\ cm^3` of sand in the mixture