1.

A car travels 140 km partly at a speed of 6 km/h and the remaining at a speed of 10 km/h. If the speeds, are reversed then it travels 8 km more in the same time. Then find the time takes by car to travel 140 km and also find what was the average speed of the car?

Answer»


ANSWER : 18 H, 70/9 km/h


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