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Total surface area of a solid hemisphere $$=2\pi r^2+\pi r^2=3\pi r^2$$ $$\therefore $$ Total surface area of a hemisphere $$=2\times 3.14\times 10\times 10\, \text{cm}^{2}=628\, \text{cm}^{2}$$ The total surface area of a solid hemisphere $$=3\pi r^{2}=3\times 3.14\times 10\times 10\, \text{cm}^{2}$$ $$= 942\, \text{cm}^{2}$$
Find the curved surface area and total surface area of a hemisphere of radius 21cm. View Solution. Q5.
Q 5. A toy is in the form of a cone mounted on a hemisphere of radius 3.5 cm. The total height of the toy is 15.5 cm. Find the total surface area. [4 MARKS] View Solution. Click here:point_up_2:to get an answer to your question :writing_hand:find the total surface area of a hemisphere of radius1.
Total surface area of the hemisphere = 462 c m 2. Total surface area of the hemisphere = 2 π r 2. ⇒ 462 = 3 π r 2. ⇒ r = 7 cm. Volume of hemisphere = 2 3 π r 3. V = 2 3 × 22 7 × 7 3. V = 718.67 c m 3
Curved Surface area of a hemisphere = 2 π r 2 = 2 × 22 7 × 21 × 21 = 2772 c m 2 Total surface area of a hemisphere = 3 π r 2 = 3 × 22 7 × 21 × 21 = 4158 c m 2 Was this answer helpful?
Find the curved surface area of a hemisphere whose radius is 7 cm. View Solution. Q 4. Find the total surface area of hemisphere of radius 7 cm. (Take π = 22 7 )
The total surface area of a metallic hemisphere is 1848 c m 2. The hemisphere is melted to form a solid right circular cone. If the radius of the base of the cone is the same as the radius of the hemisphere, its height is. 42 c m; 26 c m; 28 c m; 30 c m
Dec 4, 2020 · Given: radius, r = r/2. To Find: The total surface area of the hemisphere. Solution: The surface area of sphere = 4π, but we need the surface area of the hemisphere, So surface area of half-sphere = 2π and surface are of circle = π. The surface area of the hemisphere = surface area of half-sphere + surface area of circle = 2π +π.
Therefore, The Curved Surface Area of Hemisphere =1/2 × 4 × πr 2. Curved surface area of a hemisphere = 2πr 2. Since a sphere is a combination of a curved surface and a flat base, to find the total surface area we need to sum up both the areas. The flat base being a plane circle has an area πr 2.
The total surface area of a hemisphere of radius 7 cm is (a) (588π) cm 2 (b) (392π) cm 2 (c) (147π) cm 2 (d) (98π) cm 2
