Time and Work Practice Test 3 with solutions

Question : 5 of 40

Marks: +1, -0

Mr Quick is 60% more efficient than Mr Lazy. If Mr Quick can do a piece of work in 10 days, then find the time taken by both of them together to complete the work.

7 days
$5 5/{12}$ days
$6 1/3$ days
$6 2/{13}$ days
None of these

Validate

Solution:

If Mr Quick takes 1 day, then Mr Lazy will take

{160}/{100}

days.
If Mr Quick takes 10 days, then Mr lazy will take 16 days.
Working together work done by them in 1 day
=

1/{10}+1/{16}

{13}/{80}

So, time taken by them =

{80}/{13}

6 2/{13}

days

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