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Jen and karen are travelling for the weekend. they both leave from jen's house and meet at their destination. jen drives 45mph the whole way. karen drives 60mph but leaves a half hour after jen. how long after jen leaves does karen catch up with her?

User HerbN
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1 Answer

2 votes
For this case what we should do is write the equation of movement for each one.
We have then:
For Jen:
r = 45 * t
For Karen:
r = 60 * (t-0.5)
Equating equations we have:
45 * t = 60 * (t-0.5)
Clearing time:
60t - 45t = 30
15t = 30
t = 30/15
t = 2 hours
Answer:
karen catches up with her after 2 hours.
User Doplumi
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