Maria drives her car for 1 1/2 hours with a constant speed of 65 km/h and then for another 60 minutes with a constant speed of 85 km/h. What was her average speed?


Sagot :

averag speed = (initial speed + final speed)/2  

= (65 + 80)/2  

= 72.5 km/h

make sure to brainliest this answer so i can notice your next question :)