Question

maria notices signs on the highway that give the speed limit in kilometers per hour (kph) and miles per hour (mph). the highway has a speed limit of 90 kph or 55 mph. using this information, what is the approximate ratio of kilometers to miles?
a. 0.6 kilometers per mile
b. 1.6 kilometers per mile
c. 20 kilometers per mile
d. 35 kilometers per mile

Explanation:

Step1: Set up the ratio

We know that 90 kilometers per hour is equivalent to 55 miles per hour. The ratio of kilometers to miles is found by dividing the number of kilometers by the number of miles for the same - time interval. So the ratio $r=\frac{90}{55}$.

Step2: Simplify the ratio

$r = \frac{90}{55}=\frac{18}{11}\approx1.636\approx1.6$

Answer:

B. 1.6 kilometers per mile