The lateral surface area of the right circular cone of radius 12cm is 489.84 cm2 . find the height of the cone .
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lateral surface area of right circular cone = π rl
489.84=22 /7 ×12×L
489.84×7 /22= L
155.85cm = L
H=√l^2-r^2
=√24289.22-144
=√23145.22
Height of the cone = 155.38cm
489.84=22 /7 ×12×L
489.84×7 /22= L
155.85cm = L
H=√l^2-r^2
=√24289.22-144
=√23145.22
Height of the cone = 155.38cm
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