Question
A man travelled a total distance of 350 km. He travelled
first 250 km on car with a speed of 20 km/h and rest of the distance on bike whose speed is 12 km/h less than that of the car. Find his average speed for the whole journey.Solution
Total time taken to cover the whole journey = 250/20 + 100/8 = 12.5 + 12.5 = 25 km Desired average speed = 350/25 = 14 km/h
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