2. Mrs. Walline travelled 60 km in 1 hour and then 2 more hours to travel 40 km on citystreets. What was her average speed?
Physics · Middle School · Mon Jan 18 2021
Answered on
GIven:
Mrs. Walline travelled 60 km in 1 hour and then 2 more hours to travel 40 km on citystreets.
Determine the average speed.
D1 = 60 km
D2 = 40 km
T1 = 1 hr
T2 = 2 hr
Formula for Average Speed:
Vave = Total Displacement / Total Time
Solution:
Substitute the given values of the distance and time to the formula for the average speed.
Vave = 60 km + 40 km / 1hr + 2 hr
Vave = 100 km / 3hr
Vave = 33.33 km/hr
Final answer:
The average speed is 33.33 km/hr