Discussion
If circumference of circle is 64π then area of circle (in terms of π) is
Answer: B
Find the radius from the circumference, then use it for the area.
\[ 2\pi r = 64\pi \quad\Longrightarrow\quad r = 32 \text{ cm} \]
\[ A = \pi r^{2} = \pi (32)^{2} = 1024\pi \text{ cm}^{2} \]
The \( \pi \) cancels in the first step and returns in the second, so no numerical value for it is ever needed.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development