SOLUTION: Two small planes start from the same point and fly in opposite directions. The first plane is flying 70 mph slower than the second plane. In 3 h, the planes are 870 mi apart. Find

Question 927771: Two small planes start from the same point and fly in opposite directions. The first plane is flying 70 mph slower than the second plane. In 3 h, the planes are 870 mi apart. Find the rate of each plane
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Two small planes start from the same point and fly in opposite directions. The first plane is flying 70 mph slower than the second plane. In 3 h, the planes are 870 mi apart. Find the rate of each plane
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Slow plane DATA::
rate = x-70 ; time = 3 hr ; distance = r*t = 3x - 210 miles
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Faster plane DATA:
rate = x mph ; time = 3 hr ; distance = r*t = 3x miles
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Equation:
distance + distance = 870 miles
3x-210 + 3x = 870
6x = 1080
x = 180 mph (faster plane rate)
x-70 = 110 mph (slower plane rate)
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Cheers,
Stan H.
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