A and B completes a work together in 40 days their efficiency is in the ratio of 8 5 A alone can co...........

Quantitative Aptitude (RRB NTPC) Time and work

.A and B completes a work together in 40 days, their efficiency is in the ratio of 8:5. A alone can complete the work in how many days.

65 days

40 days

72 days

104 days

Let the efficiency of A and B be 8x and 5x respectively.

Total work = Efficiency of A and B

together x Time taken = 40x13x=520 x

Time taken by A to complete the whole

work = 520x/8x = 65 days.

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