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Calculation for circumference

  • 04-01-2016 2:43pm
    #1
    Registered Users, Registered Users 2 Posts: 54 ✭✭


    I am stuck on the question below, would be grateful for some help

    Given that at noon on Midsummer Day the tip of One World Trade Center (height 546 m) casts a shadow that is 165 m long, calculate the circumference of the Earth.

    I think you find the tangent of the angle for the height and shadow, but what you do after to get the circumference I do not know. I think you need two locations (one obviously NY and other along the same meridian).


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