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If the diameter of a sphere is 3.5 cm, then what is the total surface area of the sphere ? |
45.75 cm2 42.6 cm2 38.5 cm2 34.25 cm2 |
38.5 cm2 |
We know that, Total surface area = 4πr2 We have, The diameter of a sphere is 3.5 cm Total surface area = 4 × \(\frac{22}{7}\) × (\(\frac{3.5}{2}\))2 = 4 × \(\frac{22}{7}\) × \(\frac{12.25}{4}\) = \(\frac{22}{7}\) × 12.25 = 38.5 |
