The efficiency of work of P and Q are in the ratio 5 : 7. What will be – McqOptions

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1.	The efficiency of work of P and Q are in the ratio 5 : 7. What will be the ratio of number of days taken by them to finish the work?
A.	7 : 5
B.	3 : 4
C.	4 : 3
D.	5 : 7
Answer» B. 3 : 4

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