Question

1. A can do a piece of work in 20 days and B can
do it in 30 days. How. long would they take to
do it working together?
5​

Answer 1

Answer:

I think 15. Because if A does 50% of work in 10 days and B does 50% of work in 15 days, and if A and B are doing it together, they will finish it in 15 days.

I came up with this ans by dividing the work as half for both people.