NCERT Class 9

7. A cone, a hemisphere and a cylinder stand on equal bases and have the same height. The ratio of their volumes is 1 : 2 : 3. 7. A cone a hemisphere and a cylinder stand on equal bases and have the same height. The ratio of their volumes is 1 : 2 : [...]

6. A cylinder and a right circular cone are having the same base and same height. The volume of the cylinder is three times the volume of the cone. 6. A cylinder and a right circular cone are having the same base and same height. The volume of the cylinder is three times the volume [...]

5. The volume of the largest right circular cone that can be fitted in a cube whose edge is 2r equals to the volume of a hemisphere of radius r. 5. The volume of the largest right circular cone that can be fitted in a cube whose edge is 2r equals to the volume of [...]

4. If the radius of a cylinder is doubled and its curved surface area is not changed, the height must be halved. 4. If the radius of a cylinder is doubled and its curved surface area is not changed the height must be halved. July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes [...]

3. In a right circular cone, height, radius and slant height do not always be sides of a right triangle. 3. In a right circular cone height radius and slant height do not always be sides of a right triangle. July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT [...]

2. If the radius of a right circular cone is halved and height is doubled, the volume will remain unchanged. 2. If the radius of a right circular cone is halved and height is doubled the volume will remain unchanged. July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT [...]

1. The volume of a sphere is equal to two-third of the volume of a cylinder whose height and diameter are equal to the diameter of the sphere. 1. The volume of a sphere is equal to two-third of the volume of a cylinder whose height and diameter are equal to the diameter of the [...]

10. The radius of a hemispherical balloon increases from 6 cm to 12 cm as air is being pumped into it. The ratios of the surface areas of the balloon in the two cases is 10. The radius of a hemispherical balloon increases from 6 cm to 12 cm as air is being pumped into [...]

9. The length of the longest pole that can be put in a room of dimensions (10 m × 10 m × 5m) is 9. The length of the longest pole that can be put in a room of dimensions (10 m × 10 m × 5m) is July 3, 2021 Category: Chapter 13 - [...]

8. The number of planks of dimensions (4 m × 50 cm × 20 cm) that can be stored in a pit which is 16 m long, 12m wide and 4 m deep is 12m wide and 4 m deep is 8. The number of planks of dimensions (4 m × 50 cm × 20 [...]