Manay and Vineeta can do a work in 15 days together . If Manay can do the same work alone in 25 days, in how many days Vineeta can do the same work alone.? fast...
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Answer:
Part of work done by A in 1 day=
10
1
Part of work done by B in 1 day=
20
1
∵B alone worked during last 4 days.
∴ part of work done by B in 4 days=
20
4
=
5
1
part of work done by A and B(before 4 days of complete work) =1−
5
1
=
5
5−1
=
5
4
part of work done by A and B in 1 day=
10
1
+
20
1
=
20
2+1
=
20
3
20
3
part of work done by A and B in 1 day.
1 part of work done by A and B in
20
3
1
day =
3
20
days.
∴
5
4
part of work is done by A and B in
3
20
×
5
4
days
=
3
16
days
5
3
1
days.
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