The respective ratio between the speed 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 kmph together. What is the average speed of the car and the train together ?

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The respective ratio between the speed 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 kmph together. What is the average speed of the car and the train together ?






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