SOLUTION: I need help finding the right equation for this problem. I figured out the answer by using a chart, however I have to have an equation?! Here is the problem: At the sound of an

Question 948317: I need help finding the right equation for this problem. I figured out the answer by using a chart, however I have to have an equation?!
Here is the problem:
At the sound of an explosion, Mary began to run north at 600 ft per minute. Jim regained consciousness 4 minutes later and began to run after Mary at 800 ft per minute. How long did Jim run to catch Mary?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
At the sound of an explosion, Mary began to run north at 600 ft per minute. Jim regained consciousness 4 minutes later and began to run after Mary at 800 ft per minute. How long did Jim run to catch Mary?
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In 4 mins, Mary is 2400 ft away (600*4)
Jim "gains on" Mary at 200 ft/min (800 - 600)
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2400/200 = 12 minutes
========================
How long do they plan to run?
16 mins after the explosion is a long time.

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