document.write( "Question 145188: A tree of height 4.5 m casts a shadow of 3.0 m then the height ,in metres, of a tree casting a 2.8 m shadow is \n" ); document.write( "
Algebra.Com's Answer #105854 by nerdybill(7384)\"\" \"About 
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You are dealing with proportions.
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\n" ); document.write( "Let x = height of tree (in meters)
\n" ); document.write( "3/4.5 = 2.8/x
\n" ); document.write( "Cross multiplying we get:
\n" ); document.write( "3x = (4.5)(2.8)
\n" ); document.write( "3x = 12.6
\n" ); document.write( "x = 12.6/3
\n" ); document.write( "x = 4.2 meters
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