Question

A can do a work in 15 days and b can do the same work in 25 days.if they start together and b leaves 7 days before completing work then the work will be completed in how many days?

Answer 1

12 days will be the answer

Answer 2

Thank you for asking this question. Here is your answer:

suppose total work is 1

A=1/15 & B=1/25 for one day work

when both work together

(A+B)= (1/15)+(1/25)=7/60

for 7 days

(7/60)x7=7/15

For remaining work

1-(7/15)=8/15

Answer (8/15)