Question

33. If the circumference and area of a circle are numerically equal, then the radius of the
circle is :
এটা বৃত্তৰ পৰিসীমা আৰু কালি সাংখ্যিক ভাবে সমান হলে বৃত্তটোৰ ব্যাসার্ধ হ'ব ।
(a) 2
(b) 3
(c) 4
(d) 7​

Answer 1

Answer:

option a

click on the figure

Answer 2

Answer:

( a )

Step-by-step explanation:

From the properties of curves & circle :

• Area of circle = π r^2
• Circumference ( perimeter ) if circle = 2πr

*where r represents the radius of that circle.

Let the radius of this circle be a unit.

According to question :

= > Area of circle = circumference of circle

= > π a^2 = 2πa

= > a^2 = 2a

= > a^2 - 2a = 0

= > a( a - 2 ) = 0

= > a = 2 or a = 0 { radius = a ≠ 0 }

Thus, correct option is (a).