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March 29, 2015

March 29, 2015

Posted by **pradeep jangid** on Tuesday, October 30, 2012 at 6:04am.

- maths -
**Reiny**, Tuesday, October 30, 2012 at 8:58amDraw a cross-section diagram of the situation.

the sides of the cone would be tangent to both circles.

draw radii of both circles to a side of the cone, with the right angle as they meet the side

Let the remaining distance from the top of the smaller circle to the vertex of the cone be x cm

I see two similar right-angled triangles, so we can use ratios

(x+4)/4 = (x+14)/6

6x + 24 = 4x + 56

2x = 32

x = 16

So the height = 12 + 8 + x = 36 cm

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