Question

If a car is traveling at a speed of 28.0 m/s, is it exceeding the speed limit of 55.0 mi/h ?

Answer 1

Converting $28m/s$ to $mi/h$, obtain:

$$28\dfrac{m}{s} = 28\cdot \dfrac{0.000621mi}{\frac{1}{3600}h} = 28\cdot 2.24\dfrac{mi}{h} \approx 62.72\dfrac{mi}{h}$$

As far as $62.72>55$, then the car is exceeding the speed limit.

Answer. Yes.