A heap of rice is in the form of a cone of base diameter 24m and height 3.5 m. Find the volume of the rice. How much canvas cloth is required to just cover the heap

Explanation

Volume of cone=`1/3pir^2h` and curved surface area of cone=`pirl`

where r is the radius of cone,l is slant height and h is the height.

Given,r=12m and h=3.5m,slant height=l=`sqrt(r^2+h^2)`

thus l=12.5m

Volume of heap=`1/3xx22/7xx12xx12xx3.5=528(cm)^3`

amount of canvas required=curved surface area=`22/7xx12xx12.5=471.4(cm)^2`