Question

A sphere of radius $r$ is lying on a ground. The sphere makes an angle of measure $60$ at a point $A$ on the ground, then the distance of the center of the sphere form $A$ is

• A. $r$
• B. $2r$
• C. $\frac{r}{2}$
• D. $\sqrt{3}r$

Answer 1

The correct option is B $2r$

$\begin{array}{c}\cos {60}^0=\frac{r}{OA}\\ \frac{1}{2}=\frac{r}{OA}\\ OA=2r\end{array}$