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 one:
A) 0 feet	B) 1 feet	C) 2 feet	D) 3 feet	E) 4 feet
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= 
<gadget id="calculator">4*2</gadget>
<output>8</output>
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 * r2*8   r2=9   r = 3 feet   ANSWER:3 feet
<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?