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Working efficiencies of P and Q for Completing a piece of work are in the ratio 3: 4. The number of days to be taken

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Working efficiencies of P and Q for Completing a piece of work are in the ratio 3: 4. The number of days to be taken by them to complete the work will be in the ratio : 

(a) 3 : 2 

(b) 2: 3 

(c) 3 : 4 

(d) 4: 3

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Best answer

Correct option (c) 3 : 4

Explanation: 

Since we know efficiency and time are inversely proportion to each other.

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