Multiple choice

A bus travels a distance in 45 min, if it runs at a speed of 60 kmph on an average. Then find the speed required by bus to cover this journey in 30 min.

  1. 50 kmph

  2. 60 kmph

  3. 75 kmph

  4. 90 kmph

  5. None of these
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D Correct answer
Explanation

Distance = Speed * Time = 60 kmph * (45/60) hr = 45 km. To cover 45 km in 30 minutes (0.5 hr), the required speed is 45 / 0.5 = 90 kmph.

AI explanation

The formula for speed is distance divided by time, so the total distance is 60 kmph multiplied by 0.75 hours, giving 45 km. To cover this 45 km distance in 30 minutes, which is 0.5 hours, the required speed is 45 km divided by 0.5 hours. The result is 90 kmph.

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