SOLUTION: Two small planes start from the same point and fly in opposite directions. The first plane is flying 40 mph slower than the second plane. In 3 h, the planes are 870 mi apart. Find
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Question 1158478: Two small planes start from the same point and fly in opposite directions. The first plane is flying 40 mph slower than the second plane. In 3 h, the planes are 870 mi apart. Find the rate of each plane. Answer by ikleyn(52756) (Show Source):
If x be the slower speed (in mph), then the faster speed is (x+40) mph,
and you have this simple equation for the total distance
3*x + 3*(x+40) = 870.
The rest is clear.
