document.write( "Question 1019523: 1) How many coins, each radius 0.75 cm and thickness 0.2 cm, have to be melted to make a right circular cylinder of height 8 cm and base diameter 6 cm?\r
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Algebra.Com's Answer #635481 by ikleyn(52787) $\"\"$ $\"About$

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\n" ); document.write( "1) How many coins, each radius 0.75 cm and thickness 0.2 cm, have to be melted to make a right circular cylinder
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document.write( "The diameter of each coin is 1.5 cm, and you need  =  = 16 coins to get an equivalent base area.\r\n" );
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document.write( "Then you need  = 40 layers of coins of thickness 0.2 cm to get the height of 8 cm.\r\n" );
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document.write( "Now multiply 16*40 = 640, and you will get the required number of coins.\r\n" );
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\n" ); document.write( "\n" ); document.write( "2) Water is being pumped into a water tank of dimensions 10 m X 7.5 m X 4 m at the rate of 400 L per minute.
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document.write( "Volume of the tank  10*7.5*4 = 300   divide by the rate  0.4 :    = 750 minutes =   hours.\r\n" );
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