Time and Work Practice Test 4 with solutions

Question : 12 of 40

Marks: +1, -0

A can do a piece of work in 8 days while B can do the same work in 16 days. If they start working together, how long would they take to complete half portion of this work?

$2 2/3$ days
$3 5/7$ days
$4 1/2$ days
$3 1/2$ days

Validate

Solution:

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

1/8 + 1/{16}

3/{16}

Hence, (A + B) will do the whole work in

{16}/3

days
So, they will do the half portion of the work in

{16}/{3×2}

days =

8/3

2 2/3

days.

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