39.
|
A and B can together finish a work 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the work?
|
|
|
Answer: Option D
Explanation:
(A + B)'s 20 day's work =
|
|
1
|
x 20
|
|
=
|
2
|
.
|
30
|
3
|
Remaining work =
|
|
1 -
|
2
|
|
=
|
1
|
.
|
3
|
3
|
Now,
|
1
|
work is done by A in 20 days.
|
3
|
Therefore, the whole work will be done by A in (20 x 3) = 60 days.
