alleryA mix uses cement : sand = 1:2. If 6 bags of cement are used, how many bags of sand are needed?
A3
B8
C10
D12
Answer & Solution
Correct answer: D. 12
1. For every 1 part of cement there are 2 parts of sand.
2. 6 bags of cement is 6 times the unit mix.
3. So sand = 2 x 6 = 12 bags.
_Source: Wikipedia, Ratio, Notation and terminology_
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