SOLUTION: Mary and Nick left from the same place at the same time and drove in opposite directions along a straight road. Mar3 traveled 15 miles faster than Nick. After three hours, they w
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Question 354809: Mary and Nick left from the same place at the same time and drove in opposite directions along a straight road. Mar3 traveled 15 miles faster than Nick. After three hours, they were 315 miles apart. Find the rate at which each traveled. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Mary and Nick left from the same place at the same time and drove in opposite directions along a straight road. Mary traveled 15 miles faster than Nick. After three hours, they were 315 miles apart. Find the rate at which each traveled.
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Let Mark rate be x mph
Then Mary rate is x+15 mph
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They are separating at a rate of 2x+15 mph
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Equation:
distance = rate*time
315 = (2x+15)*3
105 = 2x+15
2x = 90
x = 45 mph (Mark's rate)
x+15 = 60 mph (Mary's rate)
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Cheers,
Stan H.
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