"A takes 5 days more than B to do a certain job and 9 days more than C
Channel: Doubtnut
Date: 2020-04-05

"A takes 5 days more than B to do a certain job and
 9 days more than C; A and B together can do the job in the same time as C.
 How many days A would take to do it? 
`5`
b. `\ 10`
c. `15`
d. `20`"