Some question: A and B can do a work in 10 days and 15 days respectively. A starts the work and B joins him after 5 days. In how many days can they complete the remaining work?\nOptions:\n(A) 6 days\n(B) 2 days\n(C) 8 days\n(D) 4 days\n(E) 3 days
Some stream of consciousness:
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Work done by A in 5 days = 5/10 = 1/2\nRemaining work = 1/2\nWork done by both A and B in one day = 1/10 + 1/15 = 5/30 = 1/6\nRemaining work = 1/2 * 6/1 = 3 days. The answer: (E).
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