Question

Three workers, working all days can do a work in
10 days, but one of them having other employment
can work only half time. In how many days the work
can be finished.​

Answer 1

Explanation:

15 day plus to5 extra work that he doesn't do

Answer 2

Answer:

12D

Explanation:

Let us assume that total amount of work required is X.

So 3 workers in 10 days can do X.

Hence 1 worker in 1 day can do X/30.

Now since 1 of them can only work half day, he/she will be able to do only X/60.

So total work received from 3 people in 1 day is:

X/30 + X/30 + X/60 = X/12