SOLUTION: A driver on a highway journey of 50 km travels the first 30 km in exactly 20 mnts and completes the rest of the journey at a constant speed of 100 kmph.find the average speed os t

Question 523010: A driver on a highway journey of 50 km travels the first 30 km in exactly 20 mnts and completes the rest of the journey at a constant speed of 100 kmph.find the average speed os the driver in first 30 km
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A driver on a highway journey of 50 km travels the first 30 km in exactly 20 minutes and completes the rest of the journey at a constant speed of 100 kmph.
find the average speed of the driver in first 30 km.
:
Speed = dist/time
change 20 min to hr
s =
s = 30 * 3
s = 90 km/h