Working 12 hours per day, Raj can complete a work in 12 days. How many hours per day he should work so as to finish the same work in 9 days?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 16 hours
Given that
Working 12 hours per day, Raj can complete a work in 12 days
Let he complete same work in 9 days by working D hours per day
According to the question
Raj × 12 × 12 = Raj × 9 × D
144 = 9 × D
D = 144/9 = 16 hours per day