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Can we make a single long curve Magnet having North Pole and South Pole on each ends from collection of small magnets? How to find the center of an ellipse given a vertex and a focus? One focus at (2,3), one vertex at (2,6), length of the minor axis is 18. Find the solution with explanation? The lateral area of a regular hexagonal prism with base edge 5 and height 10 is ? How the size of the planets is related with their cooling rate?