Multiple choice

Choose the correct answer from the alternatives given. If a train runs at 70 km/hr, it reaches its destination late by 12 minutes. But if it runs at 80 km/hr. it is late by 3 minutes. The correct lime to cover the journey is

  1. 58 minutes

  2. 2 hours

  3. 1 hour

  4. 59 minutes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let the correct travel time be T hours and the distance be D. The nine-minute difference gives D/70 - D/80 = 0.15, so D = 84 km, and the scheduled time is 84/70 - 12/60 = 1 hour.

AI explanation

Using the constant distance formula, 70 multiplied by (t plus 12) equals 80 multiplied by (t plus 3). Solving for t gives 12 minutes. The correct time for the journey is 60 minutes, which equals 1 hour.

Keep practicing — related questions