Question

. A can do a piece of work in 15 days while B alone can do it in 20 days. They worked together for 3 days then A left the work. In how many days will B finish the remaining work?​

Answer 1

Answer:

13

Step-by-step explanation:

1/15 + 1/20 = 4/60 + 3/60 = 7/60

7/60 x 3 = 21/60

1 - 21/60 = 39/60

39/60 x 20 = 13