35-36 Time Rates: Lengthening of shadow and movement of its tip in 3D space |
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33-34 Time Rates: A car traveling east and airplane traveling north |
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The Quadrilateral |
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30 - Two trains in perpendicular railroad tracks |
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28-29 Time Rates: Two cars driving on roads that intersects at 60 degree |
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25 Two cars that may collide at 12:30 PM |
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Why we ask for your donation? |
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11 - Triangular gutter of maximum carrying capacity |
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12 - Cone of maximum convex area inscribed in a sphere |
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38 - Rate of rotation of search light pointing to a ship |
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37 - A ladder sliding downward |
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26-27 Horizontal rod entering into a room from a perpendicular corridor |
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23 - Sphere cut into a pyramid |
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22 - Smallest cone that may circumscribe a sphere |
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20-21 Width of the second corridor for a pole to pass horizontally |
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19 Direction of the man to reach his destination as soon as possible |
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17-18 A man in a motorboat needs to catch a bus |
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16 - Light placed above the center of circular area |
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22-24 One car from a city starts north, another car from nearby city starts east |
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19-21 Two cars driving in parallel roads |
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