A can do a piece of work in 10 days and B in 15 days. If they work for a day alternatively. A beginning the work will be completed in:
Q1. A can do a piece of work in 10 days and B in 15 days. If they work for a day alternatively. A beginning the work will be completed in:
Answer: 12 days
Explanation: On day 1 A does 1/10 and day 2 B does 1/15; combined in each 2-day cycle = 1/10 + 1/15 = 1/6. Six such cycles (12 days) complete the entire work.