A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?

[A]. 5

[B].5 1 2

[C]. 6

[D]. 8

✅ The correct answer is option C.
B’s 10 day’s work =

1
x 10

=
2
.

15
3

Remaining work =

1 –
2

=
1
.

3
3

Now,
1
work is done by A in 1 day.

1
work is done by A in

18 x
1

= 6 days.

3
3

124. A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?