A heap of wheat is in the form of a cone of diameter 9m and height 3.5m. Find its volume. How much canvas cloth is required to just cover the heap? `(U s e\ pi=3. 14)`

Explanation

given that radius of conical heap `r=(9/2)m`

`h=3.5m`

so `l=(r^2+h^2)^(1/2)`

`l=((9/2)^2+3.5^2)^(1/2)`

`l={(130)^(1/2)}/2`

so volume `=(1/3)pi(r^2)h`

`=(1/3)pi(4.5^2)3.5`

`=74.18m^3`

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