09
Dec
Question 9: A heap of wheat is in the form of a cone whose diameter is 10.5 m and height is 3 m. Find its volume. The heap is to be covered by canvas to protect it from rain. Find the area of the canvas required.
Cone – Volume
It is quite easy to remember the formula of a cone because it is exactly one-third of the volume of a cylinder with same base radius and height. Watch activity performed in the following video that will never let you forget the formula of volume of cone.
Volume of Cone = πr²h/3
Volume of Cone = 1/3 Volume of cylinder
r = base radius of cone, h = height of cone
What is Area / Surface area / Volume
It is recommended to understand the core concept of area, surface area and volume before we attempt any question based on these concepts.
Chapter 13 – Surface areas and Volumes
Concepts
- Area / Surface area / Volume – Introduction
- Surface Area of Cube and Cuboid
- Volume Of Cuboid and Cube
- Surface Area of Right Circular Cylinder
- Volume and capacity of Cylinder
- Right circular Cone
- Surface Area of Right circular Cone
- Volume of Cylinder vs Cone
- Litres and Cubic centimetre (cm³)
- Cubic meters to litres
