Algebra.Com's Answer #795381 by ikleyn(52788)![\"\"](\"/images/stars/stars-13.gif\")  
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document.write( "An inverted square pyramid has a height equal to 8m and a top edge equal to 3m. Initially, it contains water to a depth of 5m.
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document.write( "a. what is the initial volume of the water in the tank?
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document.write( "b. If additional water is to be pumped into the tank at the rate of 20 gallons per minute, how many hours will it take to fill the tank?
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document.write( "The full volume of the pyramid is V =  =  = 3*8= 24 m^3.\r\n" );
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document.write( "The volume occupied by water is  =  = 5.589 m^3. ANSWER to question (a)\r\n" );
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document.write( "The empty volume to be filled by water is 24 - 5.589 = 18.411 m^3\r\n" );
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document.write( "The rate of filling 20 gallons per minute = 20*0.003785 = 0.0757 m^3/minute.\r\n" );
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document.write( "The time to fill the empty volume is \r\n" );
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document.write( "  minutes = 143.21 minutes = 2 hours and 23.21 minutes (about two and half hours). ANSWER to question (b)\r\n" );
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document.write( "Solved.\r
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