Question

In Canada the speed limit signs are in km/hour. Unfortunately, your speedometer only reads in mph. How fast are you allowed to go if the speed sign says 90 km/hr (rounded to the nearest tenth) ? A) 28.0 mph B) 55.9 mph C) 59.5 mph D) 97.2 mph

Answer 1

The answer is B
55.92 miles

Answer 2

Answer: B) 55.9 mph

Step-by-step explanation:

We know that $1 \text{km} = 0.621371\text{mile}$

Therefore, to convert km/hr to mph we need to multiply it by 0.621371, we get

$90\text{ km/hr}\rightarrow90\times0.621371=55.92339\ mph\approx55.9\ mph$

Therefore, if  the speed sign says 90 km/hr then you are allowed to go with 55.9 mph .