SOLUTION: a car travels at 60 km per hour over a certain distance , and then returns over the same distance at a speed of 40 km per hour. what i sthe average speed for the trip
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Question 869381: a car travels at 60 km per hour over a certain distance , and then returns over the same distance at a speed of 40 km per hour. what i sthe average speed for the trip Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! let x be the distance
x/60 is the time to there
x/40 is the return time
total time =
Take the LCM and add
we get =
Total distance = x+x = 2x
r= d/t
r=
=
r=48 average = 48 kmph
