Multiple choice

A car covers a certain distance in 8 hours and then the car reduced the speed by 12 kmph, it will cover the same distance in 10 hours. What is the distance travelled by car?

  1. 360 km

  2. 320 km

  3. 420 km

  4. 480 km
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D Correct answer
Explanation

Let the initial speed of the car be S km/h. Since the distance is the same, we can set up the equation 8 * S = 10 * (S - 12), which simplifies to 2S = 120, or S = 60 km/h. Thus, the distance travelled is 8 * 60 = 480 km.

AI explanation

Let the initial speed of the car be v kmph, making the reduced speed (v - 12) kmph. Since the distance is the same, we equate the distances: 8v = 10(v - 12). Solving this equation gives 8v = 10v - 120, so 2v = 120 and v = 60 kmph. The distance is the speed multiplied by the initial time: 60 * 8 = 480 km.

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