Question

1. claire took part in a cross country race and completed the course in 1 hour and 12 minutes. her average speed for the race was a sound 17.5 km per hour. what was the distance that she ran?

Explanation:

Step1: Convert time to hours

1 hour and 12 minutes. Since 12 minutes is $\frac{12}{60}=0.2$ hours, total time $t = 1 + 0.2 = 1.2$ hours.

Step2: Use distance formula $d = v\times t$

Given speed $v = 17.5$ km/h and time $t = 1.2$ h, so distance $d = 17.5\times1.2$.
Calculate $17.5\times1.2 = 21$.

Answer:

The distance Claire ran was 21 kilometers.