The speed of the train going from Nagpur to Allahabad is…

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The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.

  1. A. 125 km/hr
  2. B. 75 km/hr
  3. C. 135 km/hr
  4. D. 120 km/hr

Answer: Option D

Here is complete explanation of The speed of the train going from Nagpur to Allahabad is….

Solution(By ExamCraze Team)

$$eqalign{ & {text{Average speed}}, cr & = frac{{ {2 times x times y} }}{{ {x + y} }} cr & = frac{{ {2 times 100 times 150} }}{{ {100 + 150} }} cr & = frac{{ {200 times 150} }}{{250}} cr & = 120,{text{km/hr}} cr} $$

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