2. a pair of cross country skis are 210 cm long. what is their length in inches?

Explanation:

Step1: Recall conversion factor

1 inch = 2.54 cm.

Step2: Set up conversion

Let $x$ be the length in inches. We have the proportion $\frac{x}{210}=\frac{1}{2.54}$. Then $x=\frac{210}{2.54}$.

Step3: Calculate result

$x=\frac{210}{2.54}\approx82.68$ inches.

Answer:

82.68 inches