How much percentage should a racer increase speed to reduce the time by 20% to cover a fixed distance?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 25%
Given that
A racer increases speed to reduce the time by 20% to cover a fixed distance
⇒ Time ratio = 5 : 4
The distance is constant
⇒ then The speed ratio = 4 : 5
Hence, the percentage increases in speed = [(5 - 4)/4] * 100 = 100/4 = 25%.