A car is driving at an average speed of 100km/hr for 2 hours, then drives an average of 50.0km/hr for one hour. what was the average speed of the 3 hours?
100.0km/h
100.0km/h
+50.0km/h
=250.0km/3h
250.0km/3h divided by 3h =83.3km/h
I agree.
To calculate the average speed for the given scenario, you need to compute the total distance traveled and divide it by the total time taken.
First, calculate the distance traveled in the first 2 hours. The car was driving at an average speed of 100 km/hr for 2 hours, so the distance covered in this duration is:
Distance = Speed * Time
Distance = 100 km/hr * 2 hr = 200 km
Next, calculate the distance traveled in the remaining 1 hour. The car was driving at an average speed of 50.0 km/hr for this hour, so the distance covered is:
Distance = Speed * Time
Distance = 50.0 km/hr * 1 hr = 50.0 km
Now, find the total distance covered in the 3 hours by adding the distances from the two time intervals together:
Total Distance = 200 km + 50.0 km = 250.0 km
Finally, calculate the average speed by dividing the total distance by the total time taken:
Average Speed = Total Distance / Total Time
Average Speed = 250.0 km / 3 hr ≈ 83.3 km/hr
Therefore, the average speed of the car for the 3 hours is approximately 83.3 km/hr.