SOLUTION: airplane at 19,200 feet descending at a rate of 40 feet per second. Another airplane takes off and ascends at a rate of 60 feet per second. After how many seconds will the airplane

Question 1152719: airplane at 19,200 feet descending at a rate of 40 feet per second. Another airplane takes off and ascends at a rate of 60 feet per second. After how many seconds will the airplanes be at the same height? What is the height?
Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.


Your equation is


    19200 - 40x = 60x


expressing rime x in seconds when the heights are equal.


Simplify and solve


    19200 = 60x + 40x

    19200 = 100x

    x =  = 192 seconds.

Solved.

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