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A and B can do a work in 8 days, B and C...

A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in `4\ d a y s` b. `6\ d a y s` c. `8\ d a y s` d. `12\ d a y s`

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RS AGGARWAL-TIME AND WORK-All Questions
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  13. A and B can do a job together in 7 days. A is 1 3/4 times as efficient...

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  14. Kamal can do a work n 15 days. Bimal is 50% more efficient than Kam...

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  19. A is 50% as efficient as B.C does half of the work done by A and B ...

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