Question

sum of radii of two circles is 7cm and the difference of their circumference is 8cm. find the radius of two circles?

Answer 1

here is your answer....

please mark it as brainliest ....❤️❤️❤️

Answer 2

Answer:

Let the radius of 1st circle be r

Let the radius of 2nd circle be R

We are given that sum of radii of two circles is 7cm

So,$r+R=7$ --1

Circumference of circle with radius r = $2 \pi r$

Circumference of circle with radius R = $2 \pi R$

The difference of their circumference is 8cm.

So,$2 \pi (R-r) = 8$

Substitute the value of r from 1

$2 \times \frac{22}{7} (7-r-r) = 8$

$r = \frac{63}{22}$

$\frac{63}{22}+R=7$

$R=7-\frac{63}{22}$

$R=\frac{91}{22}$

Hence The radius of two circles are $\frac{91}{22}$ and  $\frac{63}{22}$