SOLUTION: A cone has a slant height of 9cm and curved surface 65πcm^2 find:
(a) The base radius of the cone
(b) The perpendicular height of the cone (c) The vertical angle of the cone t
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Question 1183365: A cone has a slant height of 9cm and curved surface 65πcm^2 find:
(a) The base radius of the cone
(b) The perpendicular height of the cone (c) The vertical angle of the cone to the nearest degree
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
.
pi * r * l = 65 pi ( r = radius, l = slant height)
r = 65 *pi/pi*l
r= 65/l = 65/9 = 7.22 cm
h=5.37 cm
tan a = 7.22/5.37
tan a = 1.34
a = cotan 1.34
a=53.2 deg
angle of cone = 2*(53.2) deg
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