SOLUTION: Katie ran 3 miles in 30 minutes. What was Katie's average speed in feet per second
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Question 869756: Katie ran 3 miles in 30 minutes. What was Katie's average speed in feet per second
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
3 miles in 30 minutes = 3 miles in 0.5 hour
D = r*t
3 = r*0.5
3/0.5 = r
6 = r
r = 6
Her speed in miles per hour is 6 mph.
Now you use these equations
1 mile = 5280 feet
1 hour = 60 min
1 min = 60 seconds
to set up conversion factors to convert miles/hour to feet/second
6 mph = (6 miles/hour)*(5280 feet/1 mile)*(1 hour/60 min)*(1 min/60 seconds)
6 mph = (6)*(5280)*(1/60)*(1/60) feet/second
6 mph = 8.8 feet/second
Her speed is 8.8 feet per second
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