Sadhana Bhadoriya

Ex – 12.1 Que No. 9

Ex – 12.1 Que No. 9 Q.9) A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, as shown in Fig. 12.11. If the height of the cylinder is 10 cm, and its base is of radius 3.5 cm, find the total surface area of the article. Solution:-

Ex – 12.1 Que No. 9 Read More »

Ex – 12.1 Que No. 8

Ex – 12.1 Que No. 8 Q.8) From a solid cylinder whose height is 2.4 cm and diameter 1.4 cm, a conical cavity of the same height and same diameter is hollowed out. Find the total surface area of the remaining solid to the nearest cm2. Solution:-

Ex – 12.1 Que No. 8 Read More »

Ex – 12.1 Que No. 7

Ex – 12.1 Que No. 7 Q.7) A tent is in the shape of a cylinder surmounted by a conical top. If the height and diameter of the cylindrical part are 2.1 m and 4 m respectively, and the slant height of the top is 2.8 m, find the area of the canvas used for

Ex – 12.1 Que No. 7 Read More »

Ex – 12.1 Que No. 6

Ex – 12.1 Que No. 6 Q.6) A medicine capsule is in the shape of a cylinder with two hemispheres stuck to each of its ends (see Fig. 12.10). The length of the entire capsule is 14 mm and the diameter of the capsule is 5 mm. Find its surface area. Solution:-

Ex – 12.1 Que No. 6 Read More »

Ex – 12.1 Que No. 5

Ex – 12.1 Que No. 5 Q.5) A hemispherical depression is cut out from one face of a cubical wooden block such that the diameter l of the hemisphere is equal to the edge of the cube. Determine the surface area of the remaining solid. Solution:-

Ex – 12.1 Que No. 5 Read More »

Ex – 12.1 Que No. 2

Ex – 12.1 Que No. 2 Q.2) A vessel is in the form of a hollow hemisphere mounted by a hollow cylinder. The diameter of the hemisphere is 14 cm and the total height of the vessel is 13 cm. Find the inner surface area of the vessel. Solution:-

Ex – 12.1 Que No. 2 Read More »