Question

A, B and C finish a work in 15 days, 20
days and 25 days. If all the three work
for a day each in turn, then on which day
the work will be completed?​

Answer 1

(A+B+C)'s one day's work=

10

1

+

15

1

+

20

1

=

60

13

Fraction of work done by B=

60

13

15

1

=

13

Answer 2

Answer:

(A+B+C)'s one day's work

=

10

1

+

15

1

+

20

1

=

60

13

Fraction of work done by B

=

60

13

15

1

=

13

4