Find the average speed for the journey:
jonas drives 70km in 45 min and then another 120km in 1 hour.
70*3/4 + 120*1
above is the distance travelled in 1.75 hours (1 hour, 45 minutes.) if we want the average speed, we want it 'per 1 hour'.
to get this, we divide the above answer(172.5 km) by 1.75. This gives us:
98.57km/h
To find the average speed for the entire journey, we need to calculate the total distance traveled and the total time taken.
To calculate the total distance traveled, we add the distances for both parts of the journey:
70 km + 120 km = 190 km
To calculate the total time taken, we add the times for both parts of the journey:
45 minutes + 60 minutes = 105 minutes
Now, we need to convert the total time taken to hours:
105 minutes ÷ 60 = 1.75 hours
Finally, to calculate the average speed, we divide the total distance by the total time taken:
190 km ÷ 1.75 hours = 108.57 km/h
Therefore, the average speed for the entire journey is approximately 108.57 km/h.