[Solved] If the distance from the focus is 10 units and the distance from the directrix is 30 units, then what is the name of the conic?

Civil Engineering
Engineering Graphics
If the distance from the focus is 10 uni...

Q.	If the distance from the focus is 10 units and the distance from the directrix is 30 units, then what is the name of the conic?
A.	circle
B.	parabola
C.	hyperbola
D.	ellipse
Answer» D. ellipse
Explanation: eccentricity is defined as the ratio of the distance from the focus to the distance from the directrix. hence from the formula of eccentricity, e = 10 ÷ 30 = 0.3333. since the value of eccentricity is less than one the conic is an ellipse.

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