Question

the difference between the radii of the smaller and the bigger circle is 7 CM and the difference between the area of the two circles is 1078 CM square then the radius of the smaller circle is


soonnnn

Answer 1

I think its the answer

Answer 2

R-r=7
3.14 (R^2-r^2)=1078
22/7 (R-r)(R+r)=1078
22×7/7(R+r)=1078
22 (R+r)=1078
R+r=1078/22
=49
on solving R-r=7 and R+r=49 we get
R=56/2=28cm
r=21cm