Question

If the circumference and the area of a circle are numerically equal, then what is the numerical value of the diameter?

• A. $1$
• B. $2$
• C. $4$
• D. $\pi$

Answer 1

The correct option is C $4$

Here, $2\pi r=\pi r^2$

Therefore, $2r=r^2$ ( Eliminate $\pi$ on both sides )

$2r/r=r$

$2=r$

Thus, the radius will be $2$ and diameter is $4$