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Time and Work Practice Test 1 with solutions
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© examsnet.com
Question : 1
Total: 40
Two persons A and B can complete a piece of work in 8 hours and 16 hours respectively. If they work at it alternately for an hour, A starting first, in how many hours will the work be finished?
9
1
3
hours
10
1
2
hours
11
1
2
hours
8
1
2
hours
Validate
Solution:
👈: Video Solution
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.
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