DSSSB · Mathematics

A person walks at a speed of 4 km/hr for 30 minutes, then runs at a speed of 12 km/hr for 20 minutes and finally cycles at a speed of 27 km/hr for 40 minutes. What is the average speed for the entire journey?

  1. 16 km/hr
  2. 24 km/hr
  3. 18 km/hr
  4. 20 km/hr
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