A car travelling at a uniform speed can cover 36 km in 2 hours, how many kilometers can it cover in 30 minutes?

4.5 km

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9 km

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18 km

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24 km

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Solution

The correct option is B 9 km

$I t i s g i v e n t h a t D i s tan c e (d 1) = 36 k m, t i m e r e q u i r e (t 1) = 2 h, T o f i n d : I f t i m e t a k e n (t 2) = 0.5 h, D i s tan c e (d 2) = ? W e k n o w t h a t s p e e d i n b o t h t h e c a s e s a r e s a m e, t h e r e f o r e, S p e e d = \frac{d 1}{t 1} = \frac{d 2}{t 2} T h e r e f o r e, \frac{36}{2} = \frac{d 2}{0.5} T h e r e f o r e, d 2 = 0.5 \times \frac{36}{2} = 9 k m$

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