A closed metallic cylindrical box is 1.25 m high and its base radius is 35 cm. I
A closed metallic cylindrical box is 1.25 m high and its base radius is 35 cm. If the sheet metal costs Rs. 80 per…
A well with inner diameter 8 m is dug 14 m deep. Earth take out of its has been
A well with inner diameter 8 m is dug 14 m deep. Earth take out of its has been evenly spread all around it…
An iron pipe 20 cm long has exterior diameter equal to 25 cm. If the thickness o
An iron pipe 20 cm long has exterior diameter equal to 25 cm. If the thickness of the pipe is 1 cm, then the…
A semicircular sheet of paper of diameter 28 cm is bent to cover the exterior su
A semicircular sheet of paper of diameter 28 cm is bent to cover the exterior surface of an open conical ice-cream cup. The depth…
In a right circular cone the radius of its base is 7 cm and its height is 24 cm.
In a right circular cone the radius of its base is 7 cm and its height is 24 cm. A cross-section is made through…
A sphere of maximum volume is cut out from a solid hemisphere of radius r. The r
A sphere of maximum volume is cut out from a solid hemisphere of radius r. The ratio of the volume of the hemisphere to…
If the surface area of two spheres are in the ratio of 4 : 25, then the ratio of
If the surface area of two spheres are in the ratio of 4 : 25, then the ratio of their volumes is :
A plot of land in the form of a rectangle has dimensions 240 m × 180 m. A drain
A plot of land in the form of a rectangle has dimensions 240 m × 180 m. A drain-let 10 m wide is dug…
The diameter of the iron ball used for the shot-put game is 14 cm. It is melted
The diameter of the iron ball used for the shot-put game is 14 cm. It is melted and then a solid cylinder of height…
If the areas of three adjacent faces of a rectangular block are in the ratio of
If the areas of three adjacent faces of a rectangular block are in the ratio of 2 : 3 : 4 and its volume…
A hemispherical bowl is 176 cm round the brim. Supposing it to be half full, how
A hemispherical bowl is 176 cm round the brim. Supposing it to be half full, how many persons may be served from it in…
A 4 cm cube is cut into 1 cm cubes. The total surface area of all the small cube
A 4 cm cube is cut into 1 cm cubes. The total surface area of all the small cubes is :