Question

A alone can do a piece of work in 13 days and B alone can do the same work in 15 days.
They start working together. After 4 days, B leaves the work. In how many days will A alone complete the remaining work?​

Answer 1

Answer:

12 11/15

Step-by-step explanation:

Given,

A alone can do a piece of work in 13 days

A=1/13

B alone can do the same work in 15 days.

B=1/15

LCM of 13,15 is 195

They start working together. After 4 days, B leaves the work.

A+B=4/195

B left

remaining work

1-4/195=191/195

A alone can complete the work in

(191/195)*13

191/15=12 11/15