COPILULUI VOR Points A and B are 90...
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COPILULUI VOR Points A and B are 90 km. apart from each other on a highway. A car starts from A and another from B at the same time. If they go in the same direction, they meet in 9 hrs. and if they go in opposite directions, they meet in 9/7 hrs. Find their speeds.

NEET/Medical Exams
Maths
Solution
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Let the speeds of the cars starting from ( A ) and ( B ) be ( x mathrm{km} / mathrm{hr} ) and ( y mathrm{km} / mathrm{hr} ). respectively According to problem, [ begin{array}{l} 9 x-90=9 y frac{9}{7} x+frac{9}{7} y=90 end{array} ] Sciving we get ( x=40 mathrm{km} / mathrm{hr} ., y=30 mathrm{km} / mathrm{hr} . ) speed of car ( A=40 mathrm{km} / mathrm{hr} & ) speed of car ( B=30 mathrm{km} / mathrm{hr} ).
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