Find the curved surface area of a hemisphere if its total surface area is 462 cm2 .

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Solution

$Let the radius of the hemisphere = r Now, TSA of hemisphere = 462 {cm}^{2} \Rightarrow 3 {πr}^{2} = 462 \Rightarrow {πr}^{2} = \frac{462}{3} = 154 {cm}^{2} Now, CSA of hemisphere = 2 {πr}^{2} = 2 \times 154 = 308 {cm}^{2}$

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Find the curved surface area of a hemisphere if its total surface area is 462 cm2 .

Let the radius of the hemisphere = rNow, TSA of hemisphere = 462 cm2⇒3πr2 = 462⇒πr2 = 4623 = 154 cm2Now, CSA of hemisphere = 2πr2 = 2 × 154 = 308 cm2

$Let the radius of the hemisphere = r Now, TSA of hemisphere = 462 {cm}^{2} \Rightarrow 3 {πr}^{2} = 462 \Rightarrow {πr}^{2} = \frac{462}{3} = 154 {cm}^{2} Now, CSA of hemisphere = 2 {πr}^{2} = 2 \times 154 = 308 {cm}^{2}$