Solve following: a) A alone can finish a piece of work in 12 days. B is twice as efficient as A. How many days will B take to finish the same work? b) A and B together can finish a work in 10 days. A alone can finish it in 15 days. In how many days can B alone finish the work? c) A can do a job in 8 days. B can do the same in 12 days. If they work together for 2 days and then A leaves, how many days will B take to finish the remaining work? d) A, B, and C together can complete a work in 6 days. If A alone can complete it in 18 days and B alone in 12 days, in how many days can C alone complete it?
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