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      Question

      A train covers a distance of 91 km at the speed of 65

      km/h the next 60 km distance covers with a speed of 40 km/h and last 88 km with the speed of 80 km/h find the average speed of the train?
      A 59.75 km/hr Correct Answer Incorrect Answer
      B 41 km/hr Correct Answer Incorrect Answer
      C 52 km/hr Correct Answer Incorrect Answer
      D 45.9 km/hr Correct Answer Incorrect Answer
      E 52 km/hr Correct Answer Incorrect Answer

      Solution

      Since the train covers different distance with different speeds. So, Average speed = Total Distance/Total Time Total distance = 91 + 60 + 88 = 239 km Time1 = 91/65, Time2 = 60/40 & Time3 = 88/80 Total Time = 91/65 + 60/40 + 88/80 Therefore, Average Speed = 239/(91/65 + 60/40 + 88/80) = 59.75 km/hr

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