Multiple choice

A train covers a certain distance in 70 minutes. If its speed is decreased by 10 km/hr, what is the time taken by the train to cover the same distance?

  1. 70 min

  2. 60 min

  3. 2 hrs

  4. Can't be determined

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

We know the train covers a distance in 70 minutes, and speed decreases by 10 km/hr. However, we don't know the original speed or the distance. Without either of these values, we cannot determine the new time. The time increase depends on how much 10 km/hr affects the original speed, which varies based on the initial speed.