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Determine the distance travelled by a car in 4s, if its speed is 90 km/h.

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50 m

200 m

150 m

100 m

answer is D.

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Detailed Solution

Speed, S = 90 km/h

S = $90 \times \frac{5}{18} m / s$

S = 25 m/s

$D i s \tan c e (D) = S p e e d (S) \times T i m e (T)$

$= 25 m / s \times 4 s = 100 m$

$D i s \tan c e (D) = 100 m$

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