Time and Work Practice Test 1 with solutions

In 2 hours the part of work =

1

8

+

1

16

=

3

16

will be completed.
Hence, in 5 pairs of hours the part of work = 5 ×

3

16

=

15

16

will be completed
Remaining work = 1 -

15

16

=

1

16

which will be done by A.
Time taken by A to complete the

1

16

work =

1 16

1 8

=

1

2

hour.
Hence, required number of hours = 10 +

1

2

= 10

1

2

hours.