Time and Work Practice Test 5 with solutions

Question : 12 of 30

Marks: +1, -0

A and B working together complete a work in 35 days. If A takes 60 days to complete it, how long would B alone take to complete it?

Solution:

(A + B)'s 1 day's work =

1/{35}

and also, A's 1 day's work =

1/{60}

Hence, B's 1 day's work =

1/{35}-1/{60}

5/{420}

1/{84}

So, B will do the whole work in 84 days.

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