Question

The ratio of cement : sand : aggregate in a mix of concrete is 1 : 3 : 3. Sang wants to make 112 kg of concrete. How much sand does he need?

Answer 1

48 kg

solution,

Ratio of cement:sand:aggregate

=1:3:3

Total of ratios=1+3+3

=7

Total concrete=112 kg

Amount of sand required:

`(ratio \: of \: sand)/(total \: ratio) * amount \: of \: concrete \\ = (3)/(7) * 112 \\ = 48 \: kg`

Hope this helps...

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Answer 2

Answer: 48

Explanation:

The share of sand in the mixture is 3/7

To make 112 kgs. of concrete, he will need

3/7 x 112 = 48 units of sand