Time and Work Practice Test 1 with solutions

Here, ratio of efficiency of A, B and C = 1 :

1

2

:

1

3

So, ratio of their time taken to complete the work = 1 : 2 : 3
Now C completes the work in 24 days, so A and B will complete the work in 8 and 16 days respectively.
Hence, (A + B + C)'s 1 day's work =

1

8

+

1

16

+

1

24

=

11

48

Therefore, (A + B + C) will complete the work in

48

11

= 4

4

11

days.