SOLUTION: In a walk-a-thon to raise money for charity, Elisa walked a certain distance at 5 mph and then jogged twice that distance at 8 mph. Her total time walking and jogging was 2 hours
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Question 319328: In a walk-a-thon to raise money for charity, Elisa walked a certain distance at 5 mph and then jogged twice that distance at 8 mph. Her total time walking and jogging was 2 hours and 15 minutes. How far did Elisa get?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a walk-a-thon to raise money for charity, Elisa walked a certain distance at 5 mph and then jogged twice that distance at 8 mph. Her total time walking and jogging was 2 hours and 15 minutes. How far did Elisa get?
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Walk DATA:
distance = x miles ; 5mph ; time = x/5 mph
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Jog DATA:
distance = 2x miles ; 8mph ; time = 2x/8 mph
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Equation:
x/5 + x/4 = 2 1/4 hrs
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(4x+5x)/20 = 9/4
9x/20 = 9/4
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x/20 = 1/4
x = 5 miles
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Cheers,
Stan H.
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