**Many highways have a speed limit of 55 mi/h. (a) Is this speed greater than, less than, or equal to 55 km/h? Explain. (b) Find the speed limit in km/h that corresponds to 55 mi/h.**

**Answer:**

**CONCEPT:**

The relation between mile and kilometer is given as follows.

**(a)** The speed of **55 mi/h** is compared with **55 km/h** as follows.

Convert the speed of **1 mi/h**into the units of **km/h**.

The equivalent speed of **1 mi/h** in the units of km/h is **1.61 km/h**.As the speed of **1 mi/h** is greater than **1 km/h**, it is clear that the speed limit of **55 mi/h** is greater than **55 km/h**.

**(b)** The speed limit in km/h corresponding to **55 mi/h** is calculated as follows.

Convert the speed of **55 mi/h** into the units of **km/h**.

Therefore, the speed limit in km/h corresponding to **55 mi/h** is **88.6 km/h**.

The speed limit in **km/h** is **88.6 km/h**. corresponding to the speed of **55 mi/h**.