For more complicated systems, the circle on a plane is replaced by a circle on a curved surface—the surface of a sphere for instance. In this case, the effect of squeezing depends on the ...

Surface Area and Volume Solved Examples Que 1: Find the lateral surface area of a cylinder with a base radius of 10 cm and height 20 cm. Solution: Given radius r = 10, height h = 20 LSA = 2 π rh ...

The surface area of a hemisphere is a curved surface which is half of the surface area of the sphere, 2 π r 2 and a flat circular surface, π r 2 Surface area of hemisphere = 2 π r 2 + π r 2 ...

(C) 3πr 2 (D) 8πr 2 Answer: (A) Explanation: Because curved surface area of a hemisphere is and here we join two solid hemispheres along their bases of radii r, from which we get a solid sphere.