SOLUTION: Motorcycle A and B leave the same place and travelling in opposite directions. If motorcycle A is travelling at 25 kph and motorcycle B is travelling at 35 kph, in how many hours w

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Question 1188075: Motorcycle A and B leave the same place and travelling in opposite directions. If motorcycle A is travelling at 25 kph and motorcycle B is travelling at 35 kph, in how many hours will they be 120 kilometers apart?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.


//     When you formulated/created your problem,  you forgot to mention that they started simultaneously . . .


        1.   Short Physics solution 


Their rate of separation is  25 + 35 = 60 km/h,

so the process will take  120%2F60 = 2 hours.


        2.   Long Algebra solution 


Write the distance equation


    25t + 35t  = 120  kilometers

    (25 + 35)t = 120

        60t    = 120

          t    = 120/60 = 2 hours.    ANSWER


Solved in two different ways for your better understanding.


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