Question 336078
Denny and John leave a station at different times, with both traveling in the same direction.
 Denny walks 60m per minute, and John cycles 210 m per minute.
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1. If Denny has already walked 1800 m, how many minutes will it take for John to catch up with Denny by bike?
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Let t = time for J to catch D
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Write a distance equation: Dist = speed * time
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D's dist + 1800 m = J's dist
60t + 1800 = 210t
1800 = 210t - 60t
1800 = 150t
t = {{{1800/150}}}
t = 12 minutes For J to catch D
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2. If John starts by bike 14 minutes after Denny departed, how many minutes
 will it take John to catch up with Denny?
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Find out how far D has traveled in 14 min and do it the same way
14 * 60 = 840 meters
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D's dist + 840m = J's dist
60t + 840 = 210t
840 = 210t - 60t
840 = 150t
t = {{{840/150}}}
t = 5.6 minutes For J to catch D