Question

1. A alone can do a piece of work in 10 days and B alone can do it in 15 days. In how many days will A and B together do the same work?
(a) 5 days
(b)6 days
(c) 8 days
id) 9 days​

Answer 1

Answer:

I think answer is 6

Step-by-step explanation:

hope it help you

Answer 2

Answer:

b)6 days

Step-by-step explanation:

Work done by a in 1 day= 1/10

work done by B in 1 day =1/15

Work done by both in 1 day = 1/10+1/15

                                            =5/30=1/6

(reciprocal it)

Both can do all work in 6 days.