Vinod and Wasim can finish a task alone in 20 and 30 days. They begin together, but Vinod leaves 5 days before the task is completed. In how many days is the task completed?

Question

Accepted Answer

15. Let the task take T days. Wasim works T days and Vinod T − 5 days: (T − 5)/20 + T/30 = 1 → 3(T − 5) + 2T = 60 → T = 15.

Vinod and Wasim can finish a task alone in 20 and 30 days. They begin together, but Vinod leaves 5 days before the task is completed. In how many days is the task completed?

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