Question

A and B together finish a work in 15 months. They worked together for 10 months and then B left. After another 12 months, A finished the remaining work. In how many months A alone can finish the job? 30 24 36 None of these 40

Solution

The correct option is C 36 (A + B)'s 10 month's work = (115 × 10) = 23 Remaining work = (1 − 23) = 13 Now, 13 work is done by A in 12 months Whole work will be done by A in (12 × 3) = 36 months

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