10.
A car moves with a speed of 30 km/h for half an hour, 25 km/h' for one
hour and 40 km/h-' for two hours. Calculate the average speed of the car.
Answers
Answered by
3
Explanation:
Distance covered in half an hour at 30km/hr = s×t = 30×1/2=15km.
Distance coveted in 1hr at 25km/hr= s×t= 25×1 =25km.
Distance covered in 2 hrs at 40km/hr=s×t= 40×2=80km
Therefore, total distance covered= 15+25+80=120km
Total time taken= 3hrs and 30 mins=7/2 hrs.
Therefore, average speed=total distance covered/total time taken = 120×2/7 = 34.28km/hr
Answered by
0
Answer:
As we know that
average speed = total distance covered / total time taken
here, total speed is 30+25km/hr = 55 * 5/18 m/s
total time = 90 mins
so,average time = 15.27 / 90
=0.696
Explanation:
Similar questions