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Solving a Quadratic Equation by Factorization Method

A car takes ...

Question

A car takes $4$ hours to cover certain distance at the speed of $30 k m / h$ . If the speed of the car is increased will it take more or less time to cover the same distance .

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Solution

If we increase the speed of car it take less time because,
$s p e e d = \frac{d i s t a n c e}{t i m e}$
and speed is inversely proportional to time.

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