Multiple choice

Two cars X and Y start at the same time moving in the same direction, at the respective speeds of 12 kmph and 16 kmph. Find the distance between them after 3 minutes.

  1. 200 m

  2. 150 m

  3. 180 m

  4. 120 m

  5. N/a
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A Correct answer
Explanation

Relative speed = 16 - 12 = 4 kmph. Time = 3 minutes = 3/60 hours = 1/20 hours. Distance = Speed * Time = 4 * (1/20) km = 0.2 km = 200 meters.

AI explanation

Using the relative speed formula for objects moving in the same direction, their relative speed is 16 kmph minus 12 kmph, which equals 4 kmph. Converting this to meters per minute gives 4000 meters per 60 minutes, or 200/3 meters per minute. Multiplying this relative speed by the time of 3 minutes gives a distance of 200 meters.

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