SOLUTION: Sarah drove from Ajax to Bixby at an average speed of 50 mi/h. On the way back, she drove 60 mi/h. The total trip took 4 2/5 hours of driving time. Find the distance between the ci
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Question 571032: Sarah drove from Ajax to Bixby at an average speed of 50 mi/h. On the way back, she drove 60 mi/h. The total trip took 4 2/5 hours of driving time. Find the distance between the cities. I tried doing a chart but the answer I got just didnt make sense at all. Word problems are not my fortay. Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Sarah drove from Ajax to Bixby at an average speed of 50 mi/h. On the way back, she drove 60 mi/h. The total trip took 4 2/5 hours of driving time. Find the distance between the cities. I tried doing a chart but the answer I got just didnt make sense at all. Word problems are not my fortay.
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Avg speed of a round trip is
2*r1*r2/(r1 + r2) (take my word for it, or I can prove it)
Avg = 2*50*60/(50 + 60) = 600/11 mi/hr
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d = r*t
d = (600/11)*4.4 = 240 miles round-trip
One way = 120 miles
