Given for conical heap,
Base Diameter = 9 cm
Base radius, r = 4.5 cm
[as radius = diameter/2]
Height, h = 3.5 cm
We know that,
Volume of cone
Where, r is base radius and h is the height of the cone.
Volume of rice = Volume of conical heap
Volume of rice
Canvas requires to just cover heap = Curved surface area of conical heap
And we know,
Curved surface area of a cone = πrl
Where r is base radius and l is slant height.
Canvas required = π(4.5)(5.7) = 80.61 cm2 [appx]
Rate this question :