Discussion of Question with ID = 070 under Time-and-Work

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A and B can complete a job in 36 and 36 days. They start together but A leaves after working for 24 days. How long would B take to finish the job counting from the day both A and B started together?


12 days.


13 days.


11 days.


15 days.

Ans: a

If B takes x days. The total job is A's work in 4 days + B's work in x days = $24/36$ + $x/36$ = 1. Solving, we get x = 12 days.

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