Practicing Success
Practicing Success
CUET Preparation Today
The total surface area of a hemisphere is 462 cm2. What is its diameter?(Take $π =\frac{22}{7}$) |
14 cm 7 cm 17.5 cm 10.5 cm |
14 cm |
We know that, Total surface area of a hemisphere = 3πr2 3 πr2 = 462 = 3 × \(\frac{22}{7}\) × r2 = 462 = r2 = 462 × \(\frac{7}{22}\) × \(\frac{1}{3}\) = r = \(\sqrt {49}\) = 7 cm Now, the diameter = 14 cm |
