Answer : 1 84 km/hr Explanation : Answer: A) 84 km/hr Explanation: Let the speeds of the car, train and bus be 5x, 9x and 4x km/hr respectively.Average speed = 5x 9x 4x/3 = 18x /3 = 6x km/hr.Also, 6x = 72 =

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The ratio of speeds of a car, a train and a bus is 5:9:4. The average speed of the car, the bus and the train is 72 km/hr together. What is the average speed of the car and the train together ?