Question

138. A and Btogether can do a piece of working
25 days. If B works alone for the last 10 days, it is
completed in 30 days. In how many days A alone
can do it?
(A) 50 days
(B) 60 days
(C) 40 days
(D) 55 days​

Answer 1

answer is option B

60 days.....