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A train ran at a speed of 35 km/hr in the first 10 minutes and the speed of 20 km/hr in the next 5 minutes. What is the average speed of the train in 15 minutes?
  • a)
    30 km/hr
  • b)
    23 km/hr
  • c)
    31 km/hr
  • d)
    29 km/hr
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A train ran at a speed of35km/hr in the first10minutes and the speed o...
Given that,
Distance covered by train in first 10 minutes =35 km/hr = 
Distance covered by train in next 5 minutes =20 km/hr = 
So, total distance covered by train is:

Given that, total time =15 minutes = 1/4 hr
∴ average speed of the train =
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A train ran at a speed of35km/hr in the first10minutes and the speed of20km/hr in the next5minutes. What is the average speed of the train in15minutes?a)30 km/hrb)23 km/hrc)31 km/hrd)29 km/hrCorrect answer is option 'A'. Can you explain this answer?
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