Question

A can do a piece of work in 4 hours, B and C together can do it in 3 hours, while A and C together can do
it in 2 hours. How long B alone takes to do it?

Thanks :)

Answer 1

Answer:

the answer is that B will take 4 hrs to do it alone

Answer 2

Answer:

12 hours

Step-by-step explanation:

work done by A in 1 hr = 1/4

work done by B and C in 1 hr = 1/3--> equation 1

work done by A and C in 1hr = 1/2 --> equation 2

from equation 2,

1/4 + C = 1/2

after solving this we get- C's work in hr = 1/4

from equation 1,

B + 1/4 = 1/3

after solving, - B,s work in hr = 1/12

therefore time taken by B= 1 / 1/12

=12