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481 . A and B can do a piece of work in 45 days and 40 days respectively. They began to do the work together but A leaves after some days and then B completed the remaining work in 23 days. The number of da
A. 9 Days B. 8 Days
C. 6 Days D.  7 Days

482 . A can do a piece of work in 4 hours ;B and C together can do it in 3 hours,while A and C together can do it 2 hours.How long will B alone take to do it ?
A. 8 hours B. 10 hours
C. 12 hours D. 24 hours

483 . A and B can do a piece of work in 5 days, B and C can do it in 7 days, A and C can do it in 4 days. Who among these will take the least time if put to do it alone ?
A. A B. B
C. C D. Data inadequate

484 . A and B can do a piece of work in 72 days, B and C can do it in 120 days, A and C can do it 90 days. In what time can A alone do it ?
A. 80 days B. 100 days
C. 120 days D. 150 days

485 . 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 :
A. 4 days B. 6 days
C. 8 days D. 12 days




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