Question

A and B can do a piece of work in 45 days and 40 days respectively. they began to do the work together but A leaves after some days and then B completed the remaining work in 23 days .After how many days did A leave the job?​

Answer 1

Answer:

9 days

Step-by-step explanation:

A's one day work = 1/45

B's one day work = 1/40

let total work be 1

B has worked extra 23 days

let x be the days left by A

=> x/45 + ( x+23)/40 = 1

=> x= 9 days