If the diameter of a sphere is 63 cm, then what is the total surface area of the sphere?
Answer & explanation
Correct answer: option 3
We know that,
Surface area of a sphere = 4πr2
Diameter of sphere = 63 cm
Now,Radius =\(\frac{63}{2}\)
Area = 4 × \(\frac{22}{7}\) × \(\frac{63}{2}\) × \(\frac{63}{2}\) = 22 × 9 × 63 = 12474