Hello there!
I believe the answer is this.
hope this helps!

<span>his average speed is </span>12 2/3 kilometers per hour
<em><u>So</u></em><em><u>,</u></em><em><u>w</u></em><em><u>h</u></em><em><u>a</u></em><em><u>t</u></em><em><u>s</u></em><em><u> </u></em><em><u>your</u></em><em><u> </u></em><em><u>question</u></em><em><u>?</u></em><em><u>?</u></em><em><u>?</u></em><em><u>?</u></em>
It's c. all of them added up is 41/24 which converts to 1 17/24.