Question

A and B can complete the work in 21 days. A alone
can do the work in 15 days . In how many days can
B alone complete the work?​

Answer 1

Answer:

A+B work=21 days

A works alone=15 days

B works alone=?

Step-by-step explanation:

let the B's work be x days

15+x=21

x=21-15

x=6

Therefore,in 6 days B alone completed the work

Answer 2

Step-by-step explanation:

A and B complete the work in 21 days Therefore, A alone do the work in 15 days

B do the work in (21 - 15) days= 6 days

Ans = In 6 days B alone can do the work.