A can complete a work in 20 days and B can complete it in 30 days. In how many days will they complete the work together?

Question

A can complete a work in 20 days and B can complete it in 30 days. In how many days will they complete the work together?

Medium · 2.5 marks

Options

1. A 10 days
2. B 12 days
3. C 15 days
4. D 18 days