conic-section

Question: An ellipse is described by using an endless string which is passed over two pins. If the axes are 6 cm and 4 cm, the necessary length of the string and the distance between the pins respectively in cm, are



1) $6,\ 2\sqrt{5}$
2) $6,\ \sqrt{5}$
3) $4,\ 2\sqrt{5}$
4) None of these
Solution: Explanation: No Explanation
Ellipse

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