Question

15. A can do a plece of work in 10 days and B in 15 days. How long will they take to finish it working together?​

Answer 1

Work done by A in 1 day=1/10

Work done by B in 1 day=1/15

Work done by A and B=1/10+1/15

Work done by A and B=25/250

working together they will complete the work in 150/25=6 days

Answer 2

Answer:

Working together, they can finish the work in 2 days.