The area of a circle is $200\, cm ^{2}$. Then, the area of a minor sector of that circle can be $\ldots \ldots \ldots . . cm ^{2}$.
$100$
$132$
$75$
$220$
The union of a chord of a circle and its corresponding arc is called $\ldots \ldots \ldots \ldots$
The radius of a circular ground is $35 \,m$. Outside it, runs a road of width $3.5\, m$. Find the area of the road. (in $m^2$)
Area of a circle is $5544 \,cm ^{2}$. Find its radius. (in $cm$)
A circular park is surrounded by a road $21\, m$ wide. If the radius of the park is $105\, m ,$ find the area of the road. (in $cm ^{2}$)
The diameter of a circle with area $38.5\,m ^{2}$ is $\ldots \ldots \ldots \ldots m$.