Question

The radius of a circle is 3m .What is the circumference of another circle whise area is 49 times that of the first?

Answer 1

Radius =3
area of circle =22/7×3×3=9×22
=198/7m^2
area of another circle =49×area of 1st circle
=49×198/7=1386m^2
area =22/7×radius ^2
1386=22/7×radius ^2
1386×7/22=radius ^2
63×7=radius^2
441=radius ^2
(21)^2=radius ^2
radius =21m
circumfence of this circle =22/7×21=66m

Answer 2

hope it will help you