Multiple choice

On a 2200 m long circular track, Sarita and Kavita started cycling from the same point but in opposite directions with speeds of 20 km/hr and 16 km/hr, respectively. After how much time will they meet again for the first time?

  1. 3 minutes 40 seconds

  2. 3 minutes 20 seconds

  3. 2 minutes 50 seconds

  4. 2 minutes 20 seconds
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A Correct answer
Explanation

Relative speed = 20 + 16 = 36 km/hr = 10 m/s. Time = Distance / Relative Speed = 2200 m / 10 m/s = 220 seconds. 220 seconds = 3 minutes 40 seconds.

AI explanation

To find the time taken to meet for the first time on a circular track, use the formula for relative speed where they cycle in opposite directions. The relative speed is 20 km/hr plus 16 km/hr, which equals 36 km/hr, or 10 meters per second. The total time taken to cover the 2200 m track at this relative speed is 2200 divided by 10, which equals 220 seconds. This time converts to 3 minutes and 40 seconds.

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