A car covers a distance of 120 km with a speed of 60 km/hour and another 60 km with an
average speed of 30 km/hour. Find the average speed of the car over the whole journey.
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40 kmph is your answer.. ↓↓
Consider the following situation:
Distance to be travelled = 120 km
1/2 distance = 60 km
Now, left distance is 60 km
To travel 60 km at the speed of 60 km/h, Time taken = 1 hour
To travel 60 km at the speed of 30 km/ h, Time taken = 2 hour
Total distance traveled = 120 km
Total time taken for journey = (1+2) hrs = 3 hrs
Therefore Average Speed = total distance ÷ total time taken = 120/3 = 40 km/h.
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