document.write( "Question 1123958: Mang Gustin can climb a coconut tree at the rate of 10 ft. per minute and return at 20 ft.per minute. If it took him 3 minutes to climb and return, what is the height of the coconut tree?
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Algebra.Com's Answer #740333 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "Let H be the height of the tree, in feet.\r\n" );
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document.write( "Then    is the time to climb the tree, while    is the time to return.\r\n" );
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document.write( "The total time is the sum   + ,  and your equation is\r\n" );
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document.write( "     +  = 3  minutes.\r\n" );
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document.write( "To solve it, multiply both sides of the equation by 20. You will get\r\n" );
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document.write( "2H + H = 60,\r\n" );
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document.write( "3H = 60  ====>  H = 60/3 = 20.\r\n" );
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document.write( "Answer.  The height of the tree is 20 ft.\r\n" );
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document.write( "Check.  The time to climb is  20/10 = 2 minutes.\r\n" );
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document.write( "        The time to return is  20/20 = 1 minute.\r\n" );
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document.write( "        2 + 1 = 3 minutes.   ! Correct !\r\n" );
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\n" ); document.write( "\n" ); document.write( "See the lesson\r
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