NCERT Class 9
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 [...]
10. A right triangle with sides 6 cm, 8 cm and 10 cm is revolved about the side 8 cm. Find the volume and the curved surface of the solid so formed.
03
Jul
10. A right triangle with sides 6 cm, 8 cm and 10 cm is revolved about the side 8 cm. Find the volume and the curved surface of the solid so formed. 10. A right triangle with sides 6 cm 8 cm and 10 cm is revolved about the side 8 cm. Find the volume [...]
9. A shopkeeper has one spherical laddoo of radius 5cm. With the same amount of material, how many laddoos of radius 2.5 cm can be made?
03
Jul
9. A shopkeeper has one spherical laddoo of radius 5cm. With the same amount of material, how many laddoos of radius 2.5 cm can be made? 9. A shopkeeper has one spherical laddoo of radius 5cm. With the same amount of material how many laddoos of radius 2.5 cm can be made? July 3, 2021 [...]
8. A small village, having a population of 5000, requires 75 litres of water per head per day. The village has got an overhead tank of measurement 40 m × 25 m × 15 m. For how many days will the water of this tank last?
03
Jul
8. A small village, having a population of 5000, requires 75 litres of water per head per day. The village has got an overhead tank of measurement 40 m × 25 m × 15 m. For how many days will the water of this tank last? 8. A small village having a population of 5000 [...]