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In the frustum of the cone the top diagram is t... - JAMB Mathematics 1994 Question

In the frustum of the cone, the top diagram is twice the bottom diameter. If the height of the frustum is h centimeters, find he height of the cone
A
2h
B
2\(\pi\)h
C
\(\pi\)h
D
\(\frac{\pi h}{2}\)
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Correct Option: A

(\frac{x}{r}) = (\frac{x + h}{2r})

2 x r = r (x + h)

Total height of cone = x + h

but x = h

total height = 2h

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