imc

We can let this circle represent the ferris wheel with center $O,$ and $C$ represent the desired point $10$ feet above the bottom. Draw a diagram like the one above. We find out $△OBC$ is a $30-60-90$ triangle. That means $\angle BOC=60^{\circ }$ and the ferris wheel has made $\frac{60}{360}=\frac{1}{6}$ of a revolution. Therefore, the time it takes to travel that much of a distance is $\frac{1}{6}\text{th}$ of a minute, or $10$ seconds. The answer is $\boxed{10}$. Alternatively, we could also say that $△ABC$ is congruent to $△OBC$ by SAS, so $AC$ is 20, and $△AOC$ is equilateral, and $\angle BOC=60^{\circ }$