If a person walks 4 km in 50 minutes, what is his speed in km/h? (2022)

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Question: If a person walks 4 km in 50 minutes, what is his speed in km/h? (2022)

Options:

Correct Answer: 5 km/h

Exam Year: 2022

Solution:

Speed = Distance / Time = 4 km / (50/60) hours = 4 / (5/6) = 4.8 km/h.

If a person walks 4 km in 50 minutes, what is his speed in km/h? (2022)

If a person walks 4 km in 50 minutes, what is his speed in km/h? (2022)

Step 1: Identify the distance walked, which is 4 km.
Step 2: Identify the time taken, which is 50 minutes.
Step 3: Convert the time from minutes to hours. Since there are 60 minutes in an hour, divide 50 by 60. This gives you 50/60 hours.
Step 4: Simplify 50/60 to 5/6 hours.
Step 5: Use the formula for speed, which is Speed = Distance / Time.
Step 6: Substitute the values into the formula: Speed = 4 km / (5/6) hours.
Step 7: To divide by a fraction, multiply by its reciprocal. So, Speed = 4 km * (6/5).
Step 8: Calculate the speed: 4 * 6 = 24, and then divide by 5, which gives you 24/5.
Step 9: Simplify 24/5 to get 4.8 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.