Question

1) The radiż of two circles are 19 cm and 9 cm respectively
find the raclius of the circle which has perimeter equal
to sum of the perimeter of the circle​

Answer 1

Answer:

hope it's helpful to you!

Step-by-step explanation:

Let the radius of required circle =r cm

Radius of 1st circle r

1

=9 cm

Radius of 2nd circle r

2

=19 cm

As per the question

Circumference of the required circle = Sum of circumference of two circles

Circumference of small circle =2πr

1

=2π×9

=18π

Circumference of small circle =2πr

2

=2π×19

=38π

Now,

Circumference of the required circle = Sum of circumference of two circles

2πr=18π+38π

2πr=58π

r=

2π

56π

r=28 cm

Hence, radius of new circle is 28 cm.