Question 1161477
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The time equation is


    {{{300/x}}} - {{{300/(x+5)}}} = 3


Cancel factor 3 in both sides


    {{{100/x}}} - {{{100/(x+5)}}} = 1.


Multiply both sides by x*(x+5).

Reduce to the standatd form quadraric equation.

Solve the quadratic equation by any way you want / you know / you like.


<U>ANSWER</U>.  Car B: 20 kph.  Car A: 25 kph.
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