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?

Spactapsula2l

Spactapsula2l

Answered question

2022-09-02

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?

Answer & Explanation

Christina Matthews

Christina Matthews

Beginner2022-09-03Added 16 answers

Let the requiblack 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 × 6 × x = 39 × 5 × 12
x = ( 39 × 5 × 12 ) ( 30 × 6 )
x = 13.
vballa15ei

vballa15ei

Beginner2022-09-04Added 1 answers

M1*D1*W2=M2*D2*W1
39*12*6=30*D2*5
D2=39*12*6/30*5
=468/25
=18 WHOLE 18/25 DAYS

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