1) A solid formed on revolving a right angled triangle about its height is a) cylinder b) sphere c) right circular cone d) two cones 2) The radii of the top and bottom of a bucket of slant height 13 cm are 9 cm and 4 cm respectively. The height of the bucket is a) 10 cm b) 13 cm c) 15cm d) 16 cm e) 12 cm 3) If two solid hemispheres of same base radius are joined together along their bases, then curved surface area of this new solid is a) 3πr² b) 4πr² c) 5πr² d) 6πr² 4) Mayank made a bird-bath for his garden in the shape of a cylinder with a hemispherical depression at one end, as shown in the figure. The height of the cylinder is 1.45 m, and its radius is 30 cm. Find the total surface area of the bird-bath. a) 3.3 m2 b) 2.3 m2 c) 1.5 m2 d) 3.5 m2 5) 2 cubes each of volume 64 cm3 are joined end to end. Find the surface area of the resulting cuboid. a) 110 cm2 b) 150 cm2 c) 165 cm2 d) 120 cm2 e) 160 cm2 6) The curved surface area of glass having radii 3 cm and 4 cm respectively and slant height 10 cm is a) 55 cm² b) 110 cm² c) 220 cm² d) 440 cm² 7) Two identical solid hemispheres of equal base radius r сm are struck together along their bases. What will be the total surface area of the combination? a) 5πr2 b) 4πr2 c) 6πr2 d) 8πr2 8) The base radii of two circular cones of the same height are in the ratio 3 : 5. The ratio of their volumes are a) 9 : 25 b) 5 : 3 c) 9 : 5 d) 3 : 25 9) If two cubes of edge 5 cm each are joined end to end, find the surface area of the resulting cuboid. a) 220 cm2 b) 200 cm2 c) 250 cm2 d) 160 cm2 10) The radii of the ends of a frustum of a cone 40 cm high are 20 cm and 11 cm. Find its slant height. a) 30 cm b) 40 cm c) 15 cm d) 41 cm 11) The diameter of the base of a right circular cylinder is 28 cm and its height is 21cm. find its curved surface area. a) 1878 cm2 b) 1843 cm2 c) 1876 cm2 d) 1848 cm2 12) A piece of paper is in the shape of a semi¬circular region of radius 10 cm. It is rolled to form a right circular cone. The slant height is a) 5 cm b) 10 cm c) 15 cm d) 20 cm 13) The volume of a vessel in the form of a right circular cylinder is 448 πcm3 and its height is 7cm. Find the radius of its base. a) 4 cm b) 8 cm c) 10 cm d) 6 cm 14) The volume of a sphere is 4851 cm3. Its diameter is a) 3.5 cm b) 7 cm c) 14 cm d) 21 cm 15) A cylinder and a cone are of same base radius and of same height. The ratio of the volume of the cylinder to that of the cone is a) 2 : 1 b) 3 : 1 c) 2 : 3 d) 3 : 2 16) A shuttlecock used for playing badminton has the shape of the combination of a) cylinder and a sphere b) a sphere and a cone c) a cylinder and a hemisphere d) frustum of a cone and a hemisphere 17) The surface area of a sphere is 616 cm2. Its radius is a) 7 cm b) 14 cm c) 21 cm d) 28 cm 18) A solid formed on revolving a right angled triangle about its height is a) cylinder b) sphere c) right circular cone d) two cones 19) The total surface area of a hemispherical solid having radius 7 cm is a) 462 cm² b) 294 cm² c) 588 cm² d) 154 cm² 20) The slant height of the frustum of a cone having radii of two ends as 5 cm and 2 cm respectively and height 4 cm is a) √26 cm b) 5 cm c) √65 cm d) 25 cm

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