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22 May, 14:05

A cylindrical rain barrel with a diameter of 2.5 feet and a height of 3.5 feet is filled to a height of 1.5 feet. How many more gallons of water can the barrel hold? Round your answer to the nearest whole number. (1ft cubed is about 7.5 gallons)

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  1. 22 May, 17:51
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    The formula for solving the volume of a tank is V=pi*r²*h where "r" represent the radius and "h" for the height.

    In the given problem we need to solve for the volumes,

    V=3.1416*r²*h

    r=diameter/2

    r=2.5/2

    r=1.25

    h=3.5-1.5 since 1.5 is already filled with water

    h=2

    V=3.1416*1.25²*2

    V=9.8175 ft³

    Solving for how many more gallons (1 cubic feet is 7.5 gallons)

    # of gallons=9.8175 * 7.5/1

    # of gallons=73.63 gallons
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