Time and Work Practice Test 2 with solutions

Ratio of efficiency of A and B = 3 : 1
Hence, ratio of their time taking = 1 : 3
Let A and B can finish the job in x and 3x days respectively.
Now, 3x – x = 60
⇒ 2x = 60
∴ x = 30 days
& also, 3x = 3 × 30 = 90 days
(A + B)'s 1 day's work =

1

30

+

1

90

=

4

90

=

2

45

Hence, working together they will finish the job in

45

2

= 22

1

2

days.