riz and annie's hot tub is circular with a diameter of 5 feet. when full, the water is 3 feet deep. there is also a woodstove that heats the water for the tub, and most of the stove is submerged under the water. the part of the stove that is underwater is 12 inches by 28 inches long by 18 inches deep. they usually fill the tub with the garden hose. if the hose puts out 9 gallons per minute, about how long does it take to fill the tub when it starts empty?

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