Multiple choice

Two cars start at the same time from one point and move along two roads at right angles to each other Their speeds are 36 km/hr and 48 km/hr respectively After 15 seconds the distance between them will be

  1. 400 m

  2. 150 m

  3. 300 m

  4. 250 m
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D Correct answer
AI explanation

Using the conversion 1 km/hr equals 5/18 m/s, the speeds of the cars are 10 m/s and 13.33 m/s. In 15 seconds, the distances covered by the two cars are 150 m and 200 m respectively. Since they move along roads at right angles, we apply the Pythagorean theorem: the distance between them is the square root of (150 squared plus 200 squared), which equals 250 m.

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