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
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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
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
Anant02:
please mark my answer as brainliest
sry bro i have solved it earlier than you...... its must be your choice
ok
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