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Question

X is 4 times more efficient than Y, then the number of days taken by X and Y are in the ratio:
  1. 8 : 1
  2. 1 : 5
  3. 6 : 8
  4. 5 : 1


Solution

The correct option is B 1 : 5
                        X                       Y
Efficiency         5           :           1
No. of days      1           :            5

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