A car moves at an average speed of 30kmh(^{-1}), how long does it take to cover 200 meters?
-
A.
2.4 sec -
B.
24 sec -
C.
144 sec -
D.
240 sec
Correct Answer: Option B
Explanation
Speed = 30 kmh(^{-1})
= (frac{30 times 1000}{3600})
= (frac{25}{3} ms^{-1})
Time = (frac{Distance}{Speed})
= (frac{200}{frac{25}{3}})
= (frac{200 times 3}{25})
= 24 seconds