Question

The difference of circumference and diameter of a circle is 30 cm. Find its area,​

Answer 1

Answer:

Correct option is B)

As we know that,

Circumference of circle =2πr

Diameter of circle =2r

Now, accordig to the question-

2πr−2r=30cm

2r(

7

22

−1)=30

⇒r=

15

15×7

⇒r=7cm