Question

the radii of two circles are 4cm and 3cm resp.The diameter of the circle having area equal to the sum of the areas of the two circles is​

Answer 1

Area of 4cm circle = (22/7)*16
Area of 3cm circle=(22/7)*9
Total=50.26+28.27=78.5
Therefore pi r^2=78.5
r^2=78.5(7/22)=25
r=root of 25=5