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

Algebra ->  Customizable Word Problem Solvers  -> Travel -> 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      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



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) About Me  (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?
------------------
In 4 mins, Mary is 2400 ft away (600*4)
Jim "gains on" Mary at 200 ft/min (800 - 600)
---
2400/200 = 12 minutes
========================
How long do they plan to run?
16 mins after the explosion is a long time.