NCERT Class 9
3. In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The lower limit of the class is :
03
Jul
3. In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The lower limit of the class is : 3. In a frequency distribution the mid value of a class is 10 and the width of the class is 6. The lower limit of the [...]
2. The range of the data : 25, 18, 20, 22, 16, 6, 17, 15, 12, 30, 32, 10, 19, 8, 11, 20 is
03
Jul
2. The range of the data : 25, 18, 20, 22, 16, 6, 17, 15, 12, 30, 32, 10, 19, 8, 11, 20 is -12 -22 10 11 15 16 … 17 18 19 2. The range of the data : 25 20 20 is 3^2 30 6 8 July 3, 2021 Category: Chapter 14 [...]
1. The class mark of the class 90 – 120 is :
03
Jul
1. The class mark of the class 90 – 120 is : 1. The class mark of the class 90 - 120 is : July 3, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,
Rain water which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius 20 cm. What will be the height of water in the cylindrical vessel if the rain fall is 1 cm. Give your answer to the nearest integer. (Take π = 3.14)
03
Jul
Rain water which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius 20 cm. What will be the height of water in the cylindrical vessel if the rain fall is 1 cm. Give your answer to the nearest integer. (Take π [...]
The radius of a sphere is increased by 10%. Prove that the volume will be increased by 33.1% approximately.
03
Jul
The radius of a sphere is increased by 10%. Prove that the volume will be increased by 33.1% approximately. The radius of a sphere is increased by 10%. Prove that the volume will be increased by 33.1% approximately. July 3, 2021 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 [...]
The surface area of a sphere of radius 5 cm is five times the area of the curved surface of a cone of radius 4 cm. Find the height and the volume of the cone.
03
Jul
The surface area of a sphere of radius 5 cm is five times the area of the curved surface of a cone of radius 4 cm. Find the height and the volume of the cone. The surface area of a sphere of radius 5 cm is five times the area of the curved surface of [...]
An edge of a cube measures r cm. If the largest possible right circular cone is cut out of this cube, then the volume of the cone (in cm^3) is 1/6 π r^3.
03
Jul
An edge of a cube measures r cm. If the largest possible right circular cone is cut out of this cube, then the volume of the cone (in cm^3) is 1/6 π r^3. An edge of a cube measures r cm. If the largest possible right circular cone is cut out of this cube then [...]
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 [...]