Time and Work Practice Test 2 with solutions

Question : 17 of 40

Marks: +1, -0

A and B together can complete a work in 12 days, A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work?

20 days
15 days
11 days
10 days

Validate

Solution:

B's 1 day's work =

1/{12}-1/{20}

2/{60}

1{30}

Hence, B's

1/2

day's work =

1/{60}

Now, work done by A and B in 1 day =

1/{20}+1/{60}

4/{60}

1/{15}

Therefore, the work will be completed by A and B in 15 days.

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