Question
The time taken by ‘X’, ‘Y’ and ‘Z’ to complete
a task is ‘6n’ days, ‘9n’ days and ‘12n’ days, respectively. What is the ratio of their efficiencies?Solution
ATQ,
Since, efficiency is inversely proportional to time taken
So, ratio of efficiency = (1/6n) : (1/9n) : (1/12n) = 6 : 4 : 3
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