A can do a work in 24 days and B can complete the same work in 12 days. In how many days the work will be completed if both work together?
Answer: C
A completes the work in 24 days. A's one day work will be 1/24 of the work.
B's one day work will be 1/12 of the work.
Both work together, in one day, 1/24 + 1/12 of the work will get over.
In one day 36/288 of the work will get over. Which means the work will get over in 288/36 days.
The work will get completed in 8 days.