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A right circular cylinder just encloses a sphere of radius r as shown in Fig 13.1. The surface area of the sphere is equal to the curved surface area of the cylinder.
03
Jul
A right circular cylinder just encloses a sphere of radius r as shown in Fig 13.1. The surface area of the sphere is equal to the curved surface area of the cylinder. A right circular cylinder just encloses a sphere of radius r as shown in Fig 13.1. The surface area of the sphere is [...]
In a cylinder, if radius is halved and height is doubled, the volume will be
03
Jul
In a cylinder, if radius is halved and height is doubled, the volume will be if radius is halved and height is doubled In a cylinder the volume will be July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 ,
8. 30 circular plates, each of radius 14 cm and thickness 3cm are placed one above the another to form a cylindrical solid. Find : (i) the total surface area (ii) volume of the cylinder so formed.
03
Jul
8. 30 circular plates, each of radius 14 cm and thickness 3cm are placed one above the another to form a cylindrical solid. Find : (i) the total surface area (ii) volume of the cylinder so formed. 8. 30 circular plates each of radius 14 cm and thickness 3cm are placed one above the another [...]
7. A sphere and a right circular cylinder of the same radius have equal volumes. By what percentage does the diameter of the cylinder exceed its height ?
03
Jul
7. A sphere and a right circular cylinder of the same radius have equal volumes. By what percentage does the diameter of the cylinder exceed its height ? 7. A sphere and a right circular cylinder of the same radius have equal volumes. By what percentage does the diameter of the cylinder exceed its height [...]
6. A cube of side 4 cm contains a sphere touching its sides. Find the volume of the gap in between.
03
Jul
6. A cube of side 4 cm contains a sphere touching its sides. Find the volume of the gap in between. 6. A cube of side 4 cm contains a sphere touching its sides. Find the volume of the gap in between. July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes , Maths [...]
5. The volumes of the two spheres are in the ratio 64 : 27. Find the ratio of their surface areas.
03
Jul
5. The volumes of the two spheres are in the ratio 64 : 27. Find the ratio of their surface areas. 5. The volumes of the two spheres are in the ratio 64 : 27. Find the ratio of their surface areas. July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes , Maths [...]
4. The water for a factory is stored in a hemispherical tank whose internal diameter is 14 m. The tank contains 50 kilolitres of water. Water is pumped into the tank to fill to its capacity. Calculate the volume of water pumped into the tank.
03
Jul
4. The water for a factory is stored in a hemispherical tank whose internal diameter is 14 m. The tank contains 50 kilolitres of water. Water is pumped into the tank to fill to its capacity. Calculate the volume of water pumped into the tank. 1. The radius of a sphere is 2r then its [...]
3. A cloth having an area of 165 m^2 is shaped into the form of a conical tent of radius 5 m
03
Jul
3. A cloth having an area of 165 m^2 is shaped into the form of a conical tent of radius 5 m 3. A cloth having an area of 165 m^2 is shaped into the form of a conical tent of radius 5 m July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes [...]
2. A semi-circular sheet of metal of diameter 28cm is bent to form an open conical cup. Find the capacity of the cup.
03
Jul
2. A semi-circular sheet of metal of diameter 28cm is bent to form an open conical cup. Find the capacity of the cup. 2. A semi-circular sheet of metal of diameter 28cm is bent to form an open conical cup. Find the capacity of the cup. July 3, 2021 Category: Chapter 13 - Surface Areas [...]
1. A cylindrical tube opened at both the ends is made of iron sheet which is 2 cm thick. If the outer diameter is 16 cm and its length is 100 cm, find how many cubic centimeters of iron has been used in making the tube ?
03
Jul
1. A cylindrical tube opened at both the ends is made of iron sheet which is 2 cm thick. If the outer diameter is 16 cm and its length is 100 cm, find how many cubic centimeters of iron has been used in making the tube ? 1. A cylindrical tube opened at both the [...]