Answer:

iv) None.

Explanation:

Conversion of speed from km/hr to m/s To convert the speed from km/hr to m/s, we use the following formula:

Speed in m/s = (Speed in km/hr x 1000) / 3600 Therefore,

to convert 30.6 km/hr to m/s, we can substitute the value in the formula:

Speed in m/s = (30.6 x 1000) / 3600 Speed in m/s

= 85/18 Speed in m/s

= 4.72

Therefore, the speed of 30.6 km/hr is equivalent to 4.72 m/s.

So, the correct answer is 'iv'.