A man can run at 5 km/h in still air. If he runs in a direction opposite to the

Practice Questions

Q1
A man can run at 5 km/h in still air. If he runs in a direction opposite to the wind blowing at 3 km/h, what is his effective speed?
  1. 2 km/h
  2. 5 km/h
  3. 8 km/h
  4. 3 km/h

Questions & Step-by-Step Solutions

A man can run at 5 km/h in still air. If he runs in a direction opposite to the wind blowing at 3 km/h, what is his effective speed?
  • Step 1: Identify the speed of the man running in still air, which is 5 km/h.
  • Step 2: Identify the speed of the wind, which is 3 km/h.
  • Step 3: Since the man is running in the opposite direction to the wind, subtract the speed of the wind from the speed of the man.
  • Step 4: Calculate the effective speed: 5 km/h (man's speed) - 3 km/h (wind speed) = 2 km/h.
  • Step 5: The effective speed of the man running against the wind is 2 km/h.
  • Relative Speed – Understanding how to calculate effective speed when two speeds are in opposite directions.
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