Multiple choice

Sanjay and Suresh started driving from two opposite points 300 km apart. The speed of Suresh's car is 60 kmph while Sanjay is two-third, as fast as Suresh. If they start at the same time, after how much time will they meet each other for the first time?

  1. 15 hr

  2. 7.5 hr

  3. 5 hr

  4. 3 hr
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D Correct answer
Explanation

Suresh speed = 60 kmph. Sanjay speed = (2/3) * 60 = 40 kmph. Relative speed = 60 + 40 = 100 kmph. Time = Distance / Relative Speed = 300 / 100 = 3 hours.

AI explanation

Sanjay's speed is 2/3 of Suresh's speed, which is (2/3) * 60 km/hr = 40 km/hr. Since they are driving towards each other from 300 km apart, their relative speed is the sum of their speeds, 60 km/hr + 40 km/hr = 100 km/hr. The time taken to meet is the total distance divided by the relative speed, 300 km / 100 km/hr = 3 hours.

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