Question

bob the builder in making 480kg of concrete mix Concrete is made by mixing cement, snad and gravel in the ratio of 1:3:4 how much sand does he need

Answer 1

Answer:

total weight=480

ratio of sand=3

sum of ratio=4+3+1=8

quantity of sand=3/8*480

180kg= ANSWER

HOPE IT HELPS YOU!!

Answer 2

He need 180 kg of sand.

Step-by-step explanation:

Given : Bob the builder in making 480 kg of concrete mix Concrete is made by mixing cement, sand and gravel in the ratio of 1:3:4.

To find : How much sand does he need ?

Solution :

Let the ratio be 'x'.

The amount of cement, sand and gravel in concrete mixture be x, 3x, 4x respectively.

So, total mixture is 480 kg.

i.e. $x+3x+4x=480$

$8x=480$

Divide both sides by 8.

$x=60$

The amount of sand is 3x.

So, $3\times 60=180$

Therefore, he need 180 kg of sand.

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