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A car covers a distance of $63 km$ in $90 minutes$ . What is the speed of the car?

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45 kmph

42 kmph

38 kmph

50 kmph

answer is B.

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Detailed Solution

The speed of the car is given at

42 kmph

.
Given, Distance

= 63 km

Time

t = 90 \min

t = 1.5 hr

It is known that the speed of the body is the rate of change of distance. Mathematically,

Speed = \frac{Distance}{Time}

On substituting the values, we get the speed of the car as,

\Rightarrow Speed = \frac{63}{1.5}

\Rightarrow Speed = 42 Kmph

Hence, the speed of the car is

42 Kmph

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