Question

A heap of rice is in the form of a cone of radius 3 m and height 3 m. Find the volume of the rice. How much cloth is required to just cover the heap?

Answer 1

volume=1/3x22/7x3x3x3
=28.285
(l)2=(3)2+(3)2
=root of 18
c.s.a=22/7x3xroot of 18

Answer 2

Volume Of Rice = pi r² h/3
                          = 22 * 3 * 3 *3
                             -----------------
                                   7 * 3
                          = 28.28 m³

Slant height of cone = root[r² + h²]
                                 = √[9 + 9]
                                 =√18
                                 = 4.24m

Curved Surface Area = pie * r * l
                                   = 22 * 3 * 4.24/7
                                   = 39.97m
Therefore,the length of cloth required to cover the heap = 39.97m
                                                                                                = 40m