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Updated on: 13 Oct 2019, 12:02
Originally posted by vishal702992 on 13 Oct 2019, 11:17.
Last edited by vishal702992 on 13 Oct 2019, 12:02, edited 1 time in total.
Last edited by vishal702992 on 13 Oct 2019, 12:02, edited 1 time in total.
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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A right circular cone of radius 9 centimetres and height 12 centimetres is cut parallel to the base, to form two pieces such that the height of smaller cone is half the height of frustum. What is the curved surface area of frustum?
A)60π
B)72π
C)90π
D)104π
E)120π
Posted from my mobile device
A)60π
B)72π
C)90π
D)104π
E)120π
Posted from my mobile device
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13 Oct 2019, 11:55
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curved surface area of frustum= \(pi*L*(r_1+r_2)\)
= pi*10*(3+9)=120*pi
= pi*10*(3+9)=120*pi
vishal702992
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13 Oct 2019, 11:58
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vishal702992
The answer options are missing. Can you please add.
