<PRE><B>Question 1056600</B>
A airplane had been flying for 1 hour when a change of wind current doubled the rate of the plane. If the entire trip of 384 km took 2.5 hours, how far did the plane travel in the first hour? 
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1st leg DATA:
time = 1 hr ; rate = x mph ; distance = x miles
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2nd leg DATA:
time = 1.5 hr ; rate = 2x mph ; distance = 1.5*2x = 3x miles
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Equation:
x + 3x = 384 km
4x = 384
x = 98 km (distance traveled in 1st hour)
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Cheers,
Stan H.
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