Question

The area of a circle is 169 times the area of another circle.Find the ratio of their circumference ??​

Answer 1

Step-by-step explanation:

A

1

=100A

2

⇒

A

2

A

1

=100

⇒

πr

2

2

πr

1

2

=100

⇒

r

2

r

1

=10

So,

c

2

c

1

=

2πr

2

2πr

1

=

r

2

r

1

=

1

10