car travels with speed 30 Km/hour for 30minutes and then with speed 40 Km/hour for 1 hour. Find the total time of travel
(1 Point) find the averge speed
by car.
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In the first case
Speed,s=30km/h
Time,t=30min=30/60=1/2h
As we know that=distance travelled=speed×time
d=30×1/2=15km
In the second case
Speed,s=40km/h
Time,t=1h
Distance travelled=speed×time
d=40×1
d=40km
Total time taken=1+1/2=3/2h
Total distance travelled=40+15=55km
Average speed=total distance travelled/total time taken
=55×2/3
=110/3km/h
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