[tex]1m \ \ is\ \ \frac{1}{1000}km\\
100m\ \ is\ \ \frac{1}{10}km\\
1s\ \ is\ \ \frac{1}{3600}h\\
9,79s\ \ is\ \ \frac{9,79}{3600}h\\\\
\frac{100meters}{9,79\ seconds}=\frac{100}{97}*\frac{\frac{1}{10}}{\frac{9,79}{3600}}=\frac{100}{97}*\frac{1}{10}*\frac{3600}{9,79}=\frac{360000}{970*9,79}=\\
\frac{360000}{9496,3}\approx\boxed{37,9\frac{km}{h}}[/tex]
