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Q.
39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?
A.
10
B.
13
C.
14
D.
15
View Answer
Correct choice: B
Explanation:
Let the required number of days be x. Less persons, More days (Indirect Proportion) More working hours per day, Less days (Indirect Proportion) Persons 30:39} Working hours/day 6:5}⋮⋮ 12:x => 30 * 6 * x = 39 * 5 * 12 => x= 13
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