| 18. | Mr. Bloop has a cylindrical water tank on his farm. It is eight feet long and 1 foot 7 inches in diameter. Water flows out a valve in the bottom of the tank at a rate of2.4cubic feet per minute. At that rate, how long will it take to empty the tank when the tank is full?
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| | 19. | A pillar from an ancient city was found buried in the ground. It had a cross-sectional shape like that shown in the figure. If the area of the cross section isfifteen and seven hundredthssquare meters, and the pillar wastwenty and six tenthsmeters tall, what was the total volume of stone contained by the pillar?

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