A is thrice as efficient as B and hence completes a work in 40days less than the number of days taken by B. What will be the number of days taken by both of them when working together? - Study24x7
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A is thrice as efficient as B and hence completes a work in 40days less than the number of days taken by B. What will be the number of days taken by both of them when working together?

A

22.5days

B

15days

C

20days

D

18days

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