<PRE><B>Question 335950</B>

A car travels 245 miles in the same time an airplane travels 2115 miles. If the rate of the car is 340 miles per hour less than the rate of the airplane, what is the rate of each? Let r represent the rate of the car.
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Car DATA:
distance = 245 miles ; rate = r mph ; time = 245/r hours 
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Plane DATA:
distance = 2115 miles ; rate = r+340 mph ; time = 2115/(r+340) hours
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Equation:
car time = plane time
245/r = 2115/(r+340)
Cross-multiply
245(r+340) = 2115r
245r + 245*340 = 2115r
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245*340 = 1870r
r = 44.55 mph (car rate)
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r+340 = 384.55 mph (plane rate)
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Cheers,
Stan H.
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