31. 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
[C] 14
[B]13
[D] 15
Answer : B
Explanation :
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| Let the required number of days be x. |
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| Less persons,More days (Indirect Proportion) |
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| More working hrs per day, Less days (Indirect Proportion) |
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| Persons | 30 : 39 | | Working hrs / day | 6 : 5 | |
| :: 12 : x |
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Title : Chain Rule Q31
Description : 31. 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 wo...
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