Multiple choice

Find the time taken to cover a distance of $120$ km at a speed of $10$ m/sec.

  1. $3$ hrs $20$ min.
  2. $8$ hrs $10$ min.
  3. $5$ hrs $40$ min.
  4. $7$ hrs $10$ min.
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A Correct answer
Explanation

Distance = 120 km = 120,000 m. Speed = 10 m/s. Time = 120,000 / 10 = 12,000 seconds. 12,000 / 3600 = 3.333 hours = 3 hours 20 minutes.

AI explanation

Using the conversion 1 m/sec equals 18/5 km/hr, the speed becomes 36 km/hr. By the formula time equals distance divided by speed, the time is 120/36 hrs. This equals 3 hrs 20 min.

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