Question

. Radius of a circle is 28cm which is surronded by another circle for which circúmference is 616 cm. find the width of circular belt made between these two circle
​

Answer 1

Answer:

2464 cm2

Step-by-step explanation:

circumference =2πr=2×

22

×28=22×8=

=176 cm

Area =πr

2

=

7

22

×28×28=88×28

=2464 cm

2

Answer 2

Given:

The radius of a circle is 28cm which is surrounded by another circle for which circumference is 616 cm.

To Find:

find the width of circular belt made between these two circle

Solution:

We are given the radius of a circle that is 28cm and it is said that this circle is surrounded by another circle whose circumference is 616cm and we need to find the width of the path these two circles will make in between them,

First, we need to find the radius of the bigger circle, which can be found by using the formula for circumference, which is,

$2\pi r=616\\r=99.59cm$

So the radius of the bigger circle is 99.59cm and the smaller one is 28cm so the width of the path will be the radius of the bigger circle minus the radius of the smaller circle,

$Width=99.59-28\\=71.59cm$

Hence, the width of the circular belt is 71.59cm.