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Time and Work
X is 4 times more efficient as Y , then the number of days taken by X and Y are in the ratio?
8 : 1
1 : 5
6 : 8
5 : 1
Correct Answer:
1 : 5
Explanation:
Efficiency (X : Y) = 5 : 1
No. of days (X : Y) = 1 : 5
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