Terry is going to make some concrete mix. He needs to mix

cement, sand and gravel in the ratio 2. 3 : 5 by weight. He

estimates he needs to make 220 kg of concrete mix.

Terry has:

• 50 kg of cement

• 90 kg of sand

• 100 kg of gravel

Does Terry have enough cement, sand and gravel to make the

concrete mix?

Question

Mathematics

Guest

6 May, 20:31

Terry is going to make some concrete mix. He needs to mix

cement, sand and gravel in the ratio 2. 3 : 5 by weight. He

estimates he needs to make 220 kg of concrete mix.

Terry has:

• 50 kg of cement

• 90 kg of sand

• 100 kg of gravel

Does Terry have enough cement, sand and gravel to make the

concrete mix?

+1

Answers (1)

Know the Answer?

Molly Snyder · Answer 1

No

Step-by-step explanation:

Sum the parts of the ratio, 2 + 3 + 5 = 10 parts

Divide 220 Kg by 10 to find the value of one part of the ratio.

220 Kg : 10 = 22 Kg ← value of 1 part of the ratio, thus

2 parts = 2 * 22 = 44 Kg ← quantity of cement needed

3 parts = 3 * 22 = 66 Kg ← quantity of sand needed

5 parts = 5 * 22 = 110 Kg ← quantity of gravel needed

He has the required amounts of cement and sand but not of gravel.

Thus he cannot mix the concrete