Let 
be the radius of the sphere.
Surface area of the sphere (S) = 
· 
= 
square meters
If the radius of a sphere is measured as 9 m with an error of 0.03 m, then find the approximate error in calculating its surface area.
If the radius of a sphere is measured as 9 m with an error of 0.03 m, then find the approximate error in calculating its surface area.