if a car travels 30 km at speed of 40 km/hr and then next 30 km at 20 km/hr then find its average speed
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Avg speed = total distance covered / total time taken
Acc. to your Q time taken for covering 30km at a speed of 40 km/hr =30km /40 km/hr = 0.75h...
For for covering 30km at 20 km = 1.5h
So
Total distance is 60km and total time taken is 2.25..
Average speed =60/2.25 = 26.6666 km/h
Acc. to your Q time taken for covering 30km at a speed of 40 km/hr =30km /40 km/hr = 0.75h...
For for covering 30km at 20 km = 1.5h
So
Total distance is 60km and total time taken is 2.25..
Average speed =60/2.25 = 26.6666 km/h
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