Asked by Trisha
It took Nina one hour longer to drive to her brother's house than it did to return home. If it took Nina 6 hours to make the round trip and she traveled 20 mph faster on the return trip, how fast did she drive on the way to her brother's house?
Answers
Answered by
oobleck
time = distance/speed. So if the distance is d, we have
d/(s-20) = d/s + 1
d/(s-20) + d/s = 6
So, d=175 miles and the trip to was driven at 50 mi/hr
175/50 = 3.5 hours to go
and
175/70 = 2.5 hours to return
d/(s-20) = d/s + 1
d/(s-20) + d/s = 6
So, d=175 miles and the trip to was driven at 50 mi/hr
175/50 = 3.5 hours to go
and
175/70 = 2.5 hours to return
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