Multiple choice

What time will a car traveling at 45 km/hr take to overtake another car that is 60 km ahead of it and traveling in the same direction at a speed of 25 km/hr?

  1. 3 hr

  2. 1 hr

  3. 7/6 hr

  4. 6/7 hr
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A Correct answer
Explanation

Relative speed = 45 - 25 = 20 km/hr. Distance to cover = 60 km. Time = Distance / Relative Speed = 60 / 20 = 3 hours.

AI explanation

To find the overtaking time, use the relative speed, which is the faster car's speed minus the slower car's speed (45 minus 25 equals 20 km/hr). The faster car must close a gap of 60 km at this relative speed. Dividing 60 km by 20 km/hr gives an overtaking time of 3 hr.

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