Nirmal completed the school project in 45 days. How many days will Amit take to complete the same work if he is 25% more efficient than Nirmal?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 36.
Let Nirmal's efficiency =100%
Amit's efficiency = 100% + 25% = 125%
Efficiency is inversely proportional to the time taken. If efficiency increases, time taken decreases.
Let the time required for Amit = x days
So, 100/125 = x/45
⇒ 4/5 = x/45
⇒ x = (4/5) × 45 = 36
Therefore, Amit will take 36 days to complete the same project.