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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
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
39 persons can repair a road in 12 days, working 5 hours a day. In how...
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:: 12 : x
Working hours/day 6:5
 30 x 6 x x = 39 x 5 x 12
 x =(39 x 5 x 12)/(30 x 6)
 x = 13.
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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)10b)13c)14d)15Correct answer is option 'B'. Can you explain this answer?
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