Time and Work Practice Test 4 with solutions

Question : 24 of 40

Marks: +1, -0

A can do a work in 30 days, B in 15 days and C in 10 days. If all three work together, how long will they take to do the same work?

Solution:

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

1/{30}+1/{15}+1/{10}

{12}/{60}

1/5

Hence, (A + B + C) will do the work in 5 days.

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