Question

height is the curved surface area and total surface area of that cone. Let us determine the volume of the cone when, (i) base area is 1.54 sq.m. and height is 2.4m. (ii) the length of base diameter is 21m and slant height is 17.5m. ​

Answer 1

Answer:

I)volume of a cone is 1/3πr2h

so

=1/3*1.54*2.4

=1.54*.8

=1.232m3

ii)

volume of a cone is 1/3πr2h

so radius is 21/2,slant height is 35/2

we know l =√(h2+r2)

l2-r2= h2

1225/4-441/4=h2

784/4=h2

196=h2

14= h

so volume = 1/3*22/7*441/4*14

=1/3*22*441*2

=22*147*2

=44*147

=6468m3