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Math Help - Application of calculus

  1. #1
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    Application of calculus

    A lamp is placed on the ground 100ft away from a wall. a max 6ft tall is walking at a speed of 10ft/sec from the lamp to the nearest point on the wall. When he is midway between the lamp and the wall , the rate of change in the length of his shadow is (in ft/sec)?

    a. 2.4
    b. 3
    c. 12
    d. 3.6

    Thanks
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  2. #2
    MHF Contributor Calculus26's Avatar
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    On my website you'll find similar problems with animations

    Got to Calculus Animations

    On the optimization and related rates page see walking towards the light and walking away from the light
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