DSSSB · Mathematics

Ritesh travels a distance of 120 km from A to B by car at a speed of 60 km/hr. He returns from B to A by another route of length 150 km at a speed of 75 km/hr. Then he again travels from A to B by a third route of length 180 km at a speed of 90 km/hr. Find his average speed for the entire journey.

  1. 80 km/hr
  2. 78 km/hr
  3. 75 km/hr
  4. 72 km/hr
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