SOLUTION: Jim can ride his bicycle 72 miles in the same time Tim can ride his bicycle in 56 miles. Jims speed is 4 miles faster than Toms speed. How fast is Tim going?

Question 951425: Jim can ride his bicycle 72 miles in the same time Tim can ride his bicycle in 56 miles. Jims speed is 4 miles faster than Toms speed. How fast is Tim going?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Jim can ride his bicycle 72 miles in the same time Tim can ride his bicycle in 56 miles. Jims speed is 4 miles faster than Toms speed. How fast is Tim going?
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Jim DATA:
dist = 72 miles ; rate = x + 4 mph ; time = 72/(x+4) hr
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Tim DATA:
dist = 56 miles ; rate = x mph ; time = 56/x hr
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Equation:
time = time
72/(x+4) = 56/x
72x = 56x + 56*4
16x = 56*4
x = (1/4)56
x = 14 mph (Tim's rate)
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Cheers,
Stan H.
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