book Maths Puzzle Numerical Ability

A car started out from Memphis toward Little Rock at the rate of 60 km/h. A second car left from the same point 2h later and drove along the same route at 75km/h. How long did it take the second car to overtake the first car?

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book Other Question
Number problems.

You have at least $30 in change in your drawer, consisting of
dimes and quarters. Write an inequality that shows the different number of coins in your drawer.

Thank you! 7x-4x+12=36-5y