A certain distance is covered by a person at a certain speed. If another person covers 25% of the distance in triple the time, the ratio of the speed of the first person to that of the second person is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 12 ∶ 1.
Speed of the first person = d/t
the second person covers 25% of the distance in triple the time. So, the distance covered by the second person = 0.25d
Time taken by the second person = 3t
Thus, the speed of the second-person = 0.25d/3t = d/12t
Ratio of speeds = (d/t)/(d/12t)
⇒ × = 12
Thus, the ratio of the speed of the first person to that of the second person = 12 : 1