SOLUTION: jOHN and David are running the 1-mile race. David enters the final quarter first and is running at a rate of 18ft./sec. John enters the final quarter 3 seconds later but is running

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Question 98413: jOHN and David are running the 1-mile race. David enters the final quarter first and is running at a rate of 18ft./sec. John enters the final quarter 3 seconds later but is running at a rate of 20 ft.sec. Who will win the race?
5280ft.= 1 mile
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
1/4*5280=1320 feet ids the distance to cover.
distance=rate*time
1320=18*t
t=1320/18
t=73.33 sec for David to finish the race.
t=(1320/20)+3
t=66+3=69 seconds for John to finish the race.
John wins by 73.33-69=7.33 seconds.