Question 499062: What is your average velocity if you drive a
distance of 115 kmat a speed of 48 km/h, then
the same distance at a speed of 67 km/h? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! What is your average velocity if you drive a
distance of 115 kmat a speed of 48 km/h, then
the same distance at a speed of 67 km/h?
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Avg speed for 2 segments of equal distance is
Avg = 2*48*67/(48 + 67)
= 55.93 km/hr
The distance doesn't matter.
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For this problem:
t = 115/48 + 115/67
t = 115*( (67+48)/48*67) total time
r = d/t = 115*2/t
r = 115*2/115*( (67+48)/48*67) The distance cancels
r = 2*48*67/(67+48) same as above
