Question

A can do a piece of work in 20 days. He works at
it for 5 days and then B finishes it in 10 more days.
In how many days will A and B together finish the
work?
(a) 8 days
(b) 10 days
(c) 12 days
(d) 6 days​

Answer 1

Step-by-step explanation:

here's ur answer hope you have been understand

Answer 2

Answer:

8 days

Step-by-step explanation:

work done by A in 5 days = 1/20*5

=1/4

remaining work=(1-1/4)

=3/4

now,3/4 work is done by B in 10 days

whole work will be done by B in 10*4/3= 40/3 days

as 1 day's work of A = 1/20

1 day's work of B =3/40

(A+B)'s 1 day's work= 1/20+3/40

= 1/8

so,both finished the work in 8 day's