Question

the volume of a right circular cone is 20096 cu. cm if the diameter of the base is 40 cm, find i) slant height of the cone ii) curved surface area of the cone ( use pie = 3.14)

Answer 1

Step-by-step explanation:

volume of cone = 1/3 πr^2h

so,

20096= 1/ 3 ×3.14×20×20×h

from this we will get height and from that height you can find the slant height

l^2 = r^2 +h^2

csa= πrl

Answer 2

Answer:

given, Volume=20096 cm³

and diameter=40cm so radius=20cm

therefore,1/3πr²h=20096

now,h=20096/3.14×400

h=16 cm

now slant height=√h²+r²

l=√16²+20²

l=√256+400

l=√656

l=25.61 cm

now,C.S.A=πrl

=3.14×20×25.61

=1608.308 cm²

By Kartikey Sharma