Answers

2016-03-06T15:47:22+05:30
4π(5)² = π(4)×l
(5)²= slant height = 25cm
radius = r = 4cm
r² + h² = l²
h² = l²-r²
h² = 609
h = √609 = 24.67 cm = height of the cone
1 5 1
2016-03-06T16:21:56+05:30
Ar(sphere)=4πr²
CSA(cone)=πr(r+h)
CSA(cone)=Ar(sphere)
4πr²=πrl
4(25)=4l
25=l
l=25cm
By using Pythagoras theorem
l²=h²+r²
h²=l²-r²
h²=25²-4²
h²=625-16
h=√609
h=24.67cm
Hence the height of cone is 24.67cm.
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