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The total surface area of a hemisphere is 1039.5 cm2. Find its diameter (in cm).1). 212). 10.53). 424). 31.5 |
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Answer» We know, total surface AREA of a HEMISPHERE = 3πr2 So, total surface area of a hemisphere = 1039.5 ⇒ 3πr2 = 1039.5 ⇒ 3 × 22/7 × r2 = 1039.5 ⇒ r2 = 110.25 ⇒ r = 10.5 ∴ Diameter of the hemisphere = 10.5 × 2 = 21 cm |
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