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4.A hemisphere has the radius measured to 8.3 cm. Find the surface area of it without the base. |
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Answer» 432.6 cm² is the lateral surface area of hemisphere.Explanation:GivenThe given SHAPE is a hemisphere.The RADIUS of the hemisphere is 8.3 cm.To FindThe curved area of the hemisphere. SolutionA SPHERE refers to a three dimensional round SOLID. the centre of the square is equidistant from each point on its surface. A hemisphere is just half of a sphere. In the given question, we need to FIND the surface area without its base, it means we have to find the lateral surface area of the hemisphere. it is half the surface area of a sphere.Lateral surface area of a hemisphere = 2πr²LSA of the hemisphere = 2π × 8.3cm × 8.3cmLSA of the hemisphere = 2 × 3.14 × 8.3cm × 8.3cmLSA of the hemisphere = 2 × 3.14 × 8.3cm × 8.3cmLSA of the hemisphere = 2 × 3.14 × 68.9 cm²LSA of the hemisphere = 432.6 cm²432.6 cm² is the approx lateral surface area of hemisphere. |
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