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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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