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Question
The proportions of ingredients in concrete mix are given by 1 : 2 : 4. What will be the actual quantity of sand per unit volume of cement, if it under goes 20% of bulking?
A.
1.5
B.
2.4
C.
4.6
D.
6.5
Answer ( Option B)

2.4

Solution

For 1 : 2 : 4 concrete, quantity of sand per unit volume of cement = 2m³.

Allowing 20% extra for bulking.

Volume of sand required = 1.2 × 2 = 2.4 m³

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