Question

a can do a job in 20 days B can do job in 30 days and C can do do in 60 days if a is helped by b and con every third day then in how many days will job be finished​

Answer 1

Answer:

B's 1 day's work =

12

1

−

20

1

=

60

2

=

30

1

(A + B)'s 1 day's work =

20

1

+

60

1

=

60

4

=

15

1

.[B works for half day only]

So, A and B together will complete the work in 15 days.