Question

The circumference of a circle exceeds its diameter by $15cm$ then, the circumference of the circle is

• A. $22.00cm$
• B. $22.5cm$
• C. $21.01cm$
• D. None

Answer 1

Answer: (A)

$22.00cm$

Let the diameter of the circle be d.

Thus, circumference is $\pi d$

Given

$\pi d-d=15$

$\Rightarrow d(\pi -1)=15$

$\Rightarrow d(227-1)=15$

$\Rightarrow d\left(157\right)=15$

$\Rightarrow d=7cm$

So, circumference $\pi d=22$cm