a closed cylindrical tank contains 36 pie cubic feet of water and its filled to half its capacity. when the tank is placed upright on its circular base on level ground, the height of water in the tank is 4 feet. when the tank is placed on its side on level ground, what is the height, in feet, of the surface of the water above the ground?  Pick.
A) 0 feet	B) 1 feet	C) 2 feet	D) 3 feet	E) 4 feet
<gadget id="calculator">36 * pi</gadget>
<output>36*pi = around 113.097336</output>

<gadget id="calculator">(36*pi) / 4</gadget>
<output>9*pi = around 28.274334</output>

<gadget id="calculator">(9*pi) / pi</gadget>
<output>9</output>

<gadget id="calculator">9 ** (1/2)</gadget>
<output>3</output>

<result>D</result>
a closed cylindrical tank contains 36 pie cubic feet of water and its filled to half its capacity. when the tank is placed upright on its circular base on level ground, the height of water in the tank is 4 feet. when the tank is placed on its side on level ground, what is the height, in feet, of the surface of the water above the ground?
sqrt(divide(divide(multiply(36, const_pi), 4), const_pi))
36 pie cubic feet of water and its filled to half tank ' s capacity . . . volume of tank = 72 pie cubic feet height of tank = 4 * 2 = 8 feet ( since tank is placed upright on its circular base on level ground , the height of water in the tank is 4 feet . ) 72 pie = pie * r 2 * 8 r 2 = 9 r = 3 feet answer : d