Question 1069623: gerry left at 4:00 pm. traveling at 55 mph. Joe left one hour later and passed gerry at 9:00 pm. How fast was joe traveling? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Joe left 1 hr later at 5:00 PM
During that 1 hr, Gerry traveled mi
Let = Joe's speed in mi/hr
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From 5:00 to 9:00 PM is hrs
During that time, Joe traveled
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Equation for Gerry:
(1)
Equation for Joe:
(2)
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(1)
(1)
Substitute (1) into (2)
(2)
(2)
Joe was traveling 68.75 mi/hr
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check:
In 5 hrs, ( 4 + 1 hr ) Gerry traveled mi
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Check my math and get
another opinion if you need to.
