Question

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; Concrete is made by mixing screenings cement and sand in the ratio 3:1:15. How much sand would be needed to make 125 tonnes of concrete?
please.

Answer 1

Step-by-step explanation:

Ratio = Screening : Cement : Sand = 3 : 1 : 15

Total = 3 + 1 + 15 = 19

Sand needed in 125 tonnes = 15/19× 125 = 98.68 tonnes.

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Answer 2

Answer:

The ratio of screening cement and sand is 3:1:15

Let the ratio be 3x,x,15x

A/q

The amount of concrete needed is 125 tonnes.

So,

3x+x+15x=125 tonnes

19x=125

X=125/19

Here the ratio of sand is 15x

So,15 X 125 /19 =98.68

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