Time and Work Practice Test 4 with solutions

Work done by Sonal in one day =

1

40

Work done by Sonam in one day =

1

60

Work done by both in one day
=

1

40

+

1

60

=

3+2

120

=

1

24

So, both together can finish the work in 24 days.
⇒ Sonal and Sonam both work for 20 days together before Sonal quit.
So, work done by both in 20 days = 20 ×

1

24

=

5

6

Remaining work = 1 -

5

6

=

1

6

Number of days taken by Sonam to do

1

60

of work = 1 day
So, number of days taken by Sonam to do

1

6

of work = 10 days
So, work has been extended for extra 10 - 4 = 6 days.