The ratio of the areas of $\odot(O, 6)$ and $\odot(P, 12)$ is ...........

The area of a circle is $200 \, cm^{2}$. Then,the area of a minor sector of that circle can be $\ldots \ldots \ldots \, cm^{2}$.

In a circle with radius $7 \, cm$,the area of a minor sector can be $\ldots \ldots \ldots \ldots \, cm^{2}$.

The numerical value of the area of a circle is greater than the numerical value of its circumference. Is this statement true? Why?

The ratio of the areas of two circles is $25: 36$. Then,the ratio of their circumferences is:

The circumference of the wheels of a truck is $440 \, cm$. They make $250$ rotations per minute. Then,the speed of the truck is $\ldots \ldots \ldots \ldots \, km/h$.