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23 June, 21:48

A cylinder has a radius of 40 ft and a height of 17 ft. What is the exact surface area of the cylinder?

1360π ft2

3200π ft2

4560π ft2

680π ft2

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  1. 23 June, 21:59
    0
    we know that

    surface area of the cylinder=2*{area of the base}+perimeter of base*height

    area of the base=pi*r²

    r=40 ft

    Area of base=pi*40²

    Area of the base=1600*pi ft²

    Perimeter of the base=2*pi*r

    Perimeter of the base=2*pi*40

    Perimeter of the base=80*pi ft

    surface area of the cylinder=2*1600*pi+80*pi*17

    surface area=4560*pi ft²

    therefore

    the answer is the option

    4560π ft2
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