View HintsThe total surface area of solid = surface area of cube + CSA of hemisphere – Area of base of hemisphere The figure is combination of hemisphere and cone. In each set there are \\(15\\) cubes, there are \\(4\\) such sets. Therefore \\(15\\times4=60\\). In the middle there are \\(6\\) cubes horiziontally. Hence, total number of cubes are \\(60+6\\). the inner surface area of the vessel = CSA of the cylindrical part + CSA of hemispherical part (2πrh+2πr2) cm2 = 2πr(h+r) cm2 the side of the cube = a = 3 cm Also, the length and breadth of the resulting cuboid will be 3 cm each. While its height will be 6 cm. So, the surface area of the cuboid = 2(lb+bh+lh) What is the CSA of sphere? Draw the structure and analyse. Equate surface area of both the solid shapes and then find the radius. Total surface area of the cylinder = 2πr(h+r) Break figure vertically into 2 cuboids. |
