Question

a and b can do a piece of work in 30 days , while B and C and do the same work in 24 days and C and A in 20 days. if they all work together, in how many days will the work finish? brainy​

Answer 1

Answer:

18 days

Step-by-step explanation:

2(A+B+C)'s 1 day work = 1/30 + 1/24 + 1/20 = 1/8

=>(A+B+C)'s 1 day's work= 1/16

work done by A,B and C in 10 days=10/16 = 5/8

Remaining work= 3/8

A's 1 day's work= (

1

16

-

1

24

)=

1

48

Now, 1/48 work is done by A in 1 day.

So, 3/8 work wil be done by A in =48 x (3/8) = 18 days