If a person runs 10 km in 40 minutes, what is his speed in km/h? (2021)

Practice Questions

Q1
If a person runs 10 km in 40 minutes, what is his speed in km/h? (2021)
  1. 12 km/h
  2. 15 km/h
  3. 18 km/h
  4. 20 km/h

Questions & Step-by-Step Solutions

If a person runs 10 km in 40 minutes, what is his speed in km/h? (2021)
  • Step 1: Identify the distance run, which is 10 km.
  • Step 2: Identify the time taken, which is 40 minutes.
  • Step 3: Convert the time from minutes to hours. Since there are 60 minutes in an hour, divide 40 by 60. This gives you 40/60 = 2/3 hours.
  • Step 4: Use the formula for speed, which is Speed = Distance / Time.
  • Step 5: Substitute the values into the formula: Speed = 10 km / (2/3) hours.
  • Step 6: To divide by a fraction, multiply by its reciprocal. So, Speed = 10 km * (3/2).
  • Step 7: Calculate the speed: 10 * 3 = 30, and then divide by 2, which gives you 15 km/h.
  • Speed Calculation – Understanding how to calculate speed using the formula Speed = Distance / Time.
  • Unit Conversion – Converting time from minutes to hours to ensure consistent units in the speed calculation.
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