Footnote
1If you tried to perform these calculations while on your bike, you likely would have crashed it. If you kept your eye on your speedometer at every instant, you certainly would have crashed it!
We could go on even more pedantically. The speedometer, like any measuring device, has uncertainties. Your memory cannot hold the full data of your speed at every instant in 10 minutes — there are infinitely many instants in that time! You are not really moving on a smooth surface; your path was really chaotically bumpy. Points on the Earth's surface are not fixed in place but are always moving about from climatic and geological phenomena. As it turns out, in the real world there is not really an objective notion ofthe 'time elapsed' or 'distance travelled': relativity theory tells us that time measurements depend on the observer. And to get an exactly accurate answer you would have to go down to the atomic level, where quantum mechanics precludes you from measuring distance and time accurately even in principle.
The real world is complicated! Luckily mathematics is much simpler.
