Solution:
Given perimeter of the base of a cone = 44 cm
2r = 44
2×22/7×r = 44
r = 44×7/(2×22)
r = 7 cm
Slant height, l = 25
height, h = √(l2-r2)
h = √(252-72)
h = √(625-49)
h = √576
h = 24 cm
Volume of the cone, V = (1/3)r2h
V = (1/3)×(22/7)×72×24
V = (22/7)×49×8
V = 22×7×8
V = 1232
Hence the volume of the cone is 1232 cm3.
Curved surface area of the cone = rl
= (22/7)×7×25
= 22×25
= 550 cm2
Hence the curved surface area of the cone is 550 cm2.