a car moves with a speed of 30 kilometre per hour for an 1 hour and 40 km per hour for 2 hours calculate the average speed of car
Answers
Answer:
Average Speed = 36.67 km/hr
Step-by-step explanation:
Average Speed = Total Distance traveled / Total Time taken
For the first 1 hour, the car traveled at a speed of 30 kmph.
This means that at the end of 1 hour the car would have covered 30 km.
Therefore in the first 1 hour the car covered 30 km.
For the next 2 hours the car has been traveling at 40 kmph.
This means that the car would cover 40 km in 1 hour. Therefore for 2 hours it would have covered 40 * 2 = 80 km
Therefore Total distance traveled is 30 + 80 = 110 km
Total time = 3 hours.
⇒ Average Speed = 110 km / 3 hr = 36.67 km/hr
This is the required answer.
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(a).speed =30km/hr
time=1hr
hence speed =distance/time
so distance=speed×time=30×1=30km
(b). speed=40km/hr
time=2hr
hence 40×2=80km.
(c) total distance=80+30=110km
(d) total time= 2+1=3hr
(e) hence average speed=total distance
total time
=110km/3hr=36.67km/hr