P covers the first one hour of his travel at 50 km/h and the next two hours at 70 km/h. What is the average speed?
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average speed= Total distance travelled÷ Time taken
Distance travelled by the car moving at a speed 50km/hr is 50km/hr×1
= 50km
Distance travelled by the car moving at a speed 70km/hr is 70km/hr ×2
=140km
Total distance= 140+50= 190 km
Total time taken= 3 hours
Average speed= Distance travelled ÷ time taken
= 190÷3
= 63.33 km/hr
The average speed covered is 63.33km/hr
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