To make concrete it take 8 parts crushed gravel, 7 parts water and 5 parts cement mix. A worker needs to make 220 kg of concrete. How much gravel, water and cement mix is needed.

Question

Mathematics

Raquel Sullivan

30 June, 23:24

To make concrete it take 8 parts crushed gravel, 7 parts water and 5 parts cement mix. A worker needs to make 220 kg of concrete. How much gravel, water and cement mix is needed.

+1

Answers (1)

Know the Answer?

Dex · Answer 1

A complete load of concrete = 8 parts gravel + 7 parts water + 5 parts cement.

Total number of parts in every load = 8 + 7 + 5 = 20 parts

If total load = 220 kg, then 20 parts = 220 kg

Divide each side by 20 : 1 part = 11 kg

gravel = 8 parts = 8 x 11 kg = 88 kg

water = 7 parts = 7 x 11 kg = 77 kg

cement = 5 parts = 5 x 11 kg = 55 kg

Check: 88 + 77 + 55 = 220 yay!