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## Henry is mixing concrete. To make concrete he needs to mix cement, sand and gravel in the ratio 3 : 2 : 7 by weight. Henry nee

Question

Henry is mixing concrete.

To make concrete he needs to mix cement, sand and gravel in the ratio 3 : 2 : 7 by weight.

Henry needs to make 180kg of concrete.

He has 46kg of cement, 29kg of sand and 105kg of gravel.

Which ingredient is Henry short of?

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Mathematics
3 years
2021-07-24T20:56:05+00:00
2021-07-24T20:56:05+00:00 1 Answers
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## Answers ( )

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Answer:1 kg of sand

Step-by-step explanation:For 180 kg of concrete using the given ratios, you need …

(3/12)(180 kg) = 45 kg of cement

(2/12)(180 kg) = 30 kg of sand

(7/12)(180 kg) = 105 kg of gravel

The inventory of 29 kg of sand is 1 kg short of the amount needed.

Henry is short 1 kg of sand.