The bulb which is placed at the focus is 1 inch from the


Question - Constructing a Headlight

A sealed-beam headlight is in the shape of a paraboloid of revolution. The bulb, which is placed at the focus, is 1 inch from the vertex. If the depth is to be 2 inches, what is the diameter of the headlight at its opening?

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Mathematics: The bulb which is placed at the focus is 1 inch from the
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