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A can do a work in 15 days and B in 20 days. If they work on it together for 4 days,then the fraction of the work that is left is ?
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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 in 90 days. In what can a alone do it ?
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A and B can do a work in 8 days B and C can do the same work in 12 days. A and B ,C together can finish it in 6 days.A and C together will do it in ?
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A and B can do a work in 12 days B and C in 15 days, C and A in 20 days. If A,B and C work together, they will complete the work in ?
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X can do 1/4 of a work in 10 days, Y can do 40% of the work in 40 days and Z can do 1/3 of the work in 13 days. Who will complete the work first ?
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