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Chapter 2: Q66. (page 109)

The area of a circle is 25蟺square centimeters. What is the circumference?

(F) 62.5蟺鈥�cm

(G) 50蟺鈥�cm

(H) 5蟺鈥�cm

(J) 10蟺cm

Short Answer

Expert verified

The option J. 10蟺cmis correct.

Step by step solution

01

Step-1. Write down the given statement.

The area of circle is 25蟺squarecm.

02

Step-2. By formula of area of circle evaluate radius of circle.

The formula for area of circle is蟺r2 where (r) is radius of circle.

So, we can find the radius of the circle as:

蟺r2=25蟺r2=25r=25r=5cm

03

Step-3. Evaluate circumference of circle.

Now, put the value of r (radius) in the formula of circumference of circle.

=2蟺r=2蟺5=10蟺cm

Hence option (J)10蟺cm is correct.

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