a, b, c After doing some work in 4 days, A leave the work and go away. The remaining work B and C could be completed in 8 days. In how much time will A alone do the work
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Their combined 4 day work = 4(1/10 + 1/15) = 12/20 = 3/5. Remaining work = 1 – 3/5 = ⅖. This means C did 2/5 work in 4 days, hence he can finish the complete work in 5/2 × 4 = 10 days.
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