If 15 men, working 9 hours a day, can reap a field in 8 days, in how many days will 9 men reap the field, working 8 hours a day?
Explanation:
Let the required number of days be x.
More men, Less days ⇒ days ∝ 1/men (Indirect Proportion)
Less hours per day, More days ⇒ days ∝ 1/hours (Indirect Proportion)
⇒ days ∝ 1/(men × hours)
⇒ M1H1D1 = M2H2D2
⇒ 15 × 9 × 8 = 9 × 8 × D2
⇒ D2 = 15
Hence, required number of days = 15.
Hence, 15.
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.