Question 678881
Mr. Fox and Mr. Ox are running to the other end of the football field.
 It takes Mr. Ox 2 seconds to run 10 yards
 ad Mr. Fox 5 second to run 10 yards.
 Mr. Fox had a 20 yard head start.
 How long does it take Mr. Ox to catch Mr. Fox?
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Find O's speed: 10/2 = 5 yds/sec
Find F's speed: 10/5 = 2 yds/sec
:
Let t = time for O to catch F (in seconds)
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Write a distance equation; dist = speed * time
:
O's dist = F's dist + 20 yds
5t = 2t + 20
5t - 2t = 20
3t = 20
t = 20/3 sec, about 6.67 seconds
:
Check this, how many yards each ran
6.67 * 5 = 33.3 yds; O's run
6.67 * 2 = 13.3 yds: F's run
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difference: 20 yds
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