Solution:
Required area of canvas is equal to curved surface area of cone.diameter = 4.2 m, radius = 2.1 m, height = 2.8 m Let
be the slant height of cone
Curved surface area of cone = 
Hence option (1) is correct.
Mathematics A heap of paddy is in the form of a right circular cone whose diameter is 4.2 m and height 2.8 m if the heap is to be covered exactly by a canvas to protect it from rain the find the area of the canvas neede.
A heap of paddy is in the form of a right circular cone whose diameter is 4.2 m and height 2.8 m if the heap is to be covered exactly by a canvas to protect it from rain the find the area of the canvas neede.
diameter = 4.2 m, radius = 2.1 m, height = 2.8 m Let
be the slant height of coneCurved surface area of cone = Hence option (1) is correct.
