Question

Cierto tipo de mezcla contiene 5kg de arena y 3 kg de cemento: un constructor necesita 12 toneladas de esta mezcla. ¿qué cantidad se necesita de arena y de cemento?

Answer 1

the sand and cement needed is 7.5 kg and 4.5 kg respectively

Explanation:

The computation of the sand and cement needed is shown below:

Given that

The mix of sand and cement is 5kg and 3kg i.e. its ratio is 5:3

And there is a 12kg of mix of both things

So individually it required

For sand = 12 × 5 ÷ 8

= 7.5 kg

For cement = 12 × 3 ÷ 8

= 4.5 kg

Hence, the sand and cement needed is 7.5 kg and 4.5 kg respectively