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28 September, 13:03

A cylindrical gasoline storage tank on mr Edwards farm needs to be painted. The tank is 8 feet long and has a diameter of 4 feet. If one gallon of paint covers 350 square feet, how many cans of paint will mr. Edwards need

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  1. 28 September, 13:14
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    r=2 ft

    h=8 ft

    surface area of tank=area of the two ends + area of cylindrical surface

    area of two ends=2*πr^2=2*π2^2=8π

    area of cylindrical part of tank=circumference*height=2πr*8=32π

    Total area to be painted=8π+32π=40π sq ft

    Cans of paint needed = 40π/350=.35
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