Question:The rates of working of A and B are in the ratio 5 : 6. The number of days taken by them to finish the work are in the ratio : 

A `5 : 6` 
B `25 : 36` 
C `6 : 5` 
D None of these 

+ Answer
C 

+ Explanation
solution:
Ratio of number of days `= 1/5 : 1/6`
                                 `= 6 : 5`.

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Md. Habib Ullah

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