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Mensuration 3D || 20.04.2021
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Radii of the two circular faces of a frustum of a cone are 5 cm and 4 cm. If the height of the frustum is 21 cm, what is its volume in cm3?
5 cubes, each of edge 4 cm, are joined end to end. What is the total surface area of the resulting cuboid?
A cuboidal tank measuring 10 m × 8 m × 6 m with a circular hole of one-meter diameter on top, how much of iron sheets (m2) will be needed to make such a tank? (Correct to 1 decimal place)
A solid metallic sphere of radius 8 cm is melted and drawn into a wire of uniform cross-section. If the length of the wire is 24 m, then its radius (in mm) is:
Height of a cone is 12 cm and radius of its base is 3 cm. The cone is cut into two parts by a plane parallel to its base such that height of both the parts is same. What is the ratio of volume of upper part and lower part respectively?
A cylindrical well of height 80 meters and radius 7 meters is dug in a field 28 meters long and 22 meters wide. The earth taken out is spread evenly on the field. What is the increase (in meters) in the level of the field?
A tent is to be built in the form of a cylinder of radius 7 m surmounted by a cone of the same radius. If the height of the cylindrical part is 8 m and slant height of the conical part is 12 m, how much canvas will be required to build the tent? Allow 20% extra canvas for folding and stitching. (Take π = 22/7)
The base of right prism is a trapezium whose parallel sides are 11 cm and 15 cm and the distance between them is 9 cm. if the volume of the prism is 1731. 6 cm3, then the height (in cm) of the prism will
The ratio of curved surface area of two cones is 1 : 8 and the ratio of there slant heights is 1 : 4. What is the ratio of the radius of the two cones?
The base of a right pyramid is an equilateral triangle with side 8 cm, and the height of the pyramid is . The volume (in cm3) of the pyramid is :
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Apr 20SSC & Railway
Naresh RawalMember since Jul 2020Assistant Section Officer, Central Secretariat (AIR 203) - SSC CGL 2018 #Alumnus of IIT Dhanbad