NCERT Class 9

7. A cylindrical roller 2.5 m in length, 1.75 m in radius when rolled on a road was found to cover the area of 5500 m^2. How many revolutions did it make? 1.75 m in radius when rolled on a road was found to cover the area of 5500 m^2. How many revolutions did it [...]

6. A school provides milk to the students daily in a cylindrical glasses of diameter 7 cm. If the glass is filled with milk upto an height of 12 cm, find how many litres of milk is needed to serve 1600 students. 6. A school provides milk to the students daily in a cylindrical glasses [...]

5. Two solid spheres made of the same metal have weights 5920 g and 740 g, respectively. Determine the radius of the larger sphere, if the diameter of the smaller one is 5 cm. 5. Two solid spheres made of the same metal have weights 5920 g and 740 g if the diameter of the [...]

4. How many square metres of canvas is required for a conical tent whose height is 3.5 m and the radius of the base is 12 m? 4. How many square metres of canvas is required for a conical tent whose height is 3.5 m and the radius of the base is 12 m? July [...]

3. Find the amount of water displaced by a solid spherical ball of diameter 4.2 cm, when it is completely immersed in water. 3. Find the amount of water displaced by a solid spherical ball of diameter 4.2 cm when it is completely immersed in water. July 3, 2021 Category: Chapter 13 - Surface Areas [...]

2. A storage tank is in the form of a cube. When it is full of water, the volume of water is 15.625 m^3 . If the present depth of water is 1.3 m, find the volume of water already used from the tank. 2. A storage tank is in the form of a cube. [...]

1. Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimensions 16 cm × 8 cm × 8 cm. When 16 spheres are packed the box is filled with preservative liquid. Find the volume of this liquid. Give your answer to the nearest integer. [Use π = 3.14 ] [...]

10. If the radius of a cylinder is doubled and height is halved, the volume will be doubled. 10. If the radius of a cylinder is doubled and height is halved the volume will be doubled. July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,

9. If a sphere is inscribed in a cube, then the ratio of the volume of the cube to the volume of the sphere will be 6 : π. 9. If a sphere is inscribed in a cube then the ratio of the volume of the cube to the volume of the sphere will be [...]

8. If the length of the diagonal of a cube is 6 root 3 cm, then the length of the edge of the cube is 3 cm. 8. If the length of the diagonal of a cube is 6 root 3 cm then the length of the edge of the cube is 3 cm. July [...]