Arithmetic Ability
Time and Work

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Q.

A and B can do a piece of work in 40 and 50 days. If they work at it an alternate days with A beginning in how many days, the work will be finished ?

View Answer

Correct choice: B

Explanation:

(A+B)'s two days work = 1/40+1/50=9/200 Evidently, the work done by A and B duing 22 pairs of days i.e in 44 days = 22×9/200=198/200 Remaining work = 1−198200= 1/100 Now on 45th day A will have the turn to do 1/100 of the work and this work A will do in 40×1/100=25 Therefore, Total time taken = 44 2/5daya
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