document.write( "Question 991365: A man 6 feet tall walks away from light 10 feet above the ground. If his shadow lengthens at a rate of 2 feet per second, how fast is he walking?\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Please give details
\n" ); document.write( "Thank you
\n" ); document.write( "

Algebra.Com's Answer #611254 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Start with a right triangle.
\n" ); document.write( "Form similar triangles with height 10 and height 6.
\n" ); document.write( "The horizontal distance from the light to the man is \"a\".
\n" ); document.write( "The horizontal distance from the man to the tip of the shadow is \"b\".
\n" ); document.write( "So then,
\n" ); document.write( "\"10%2F6=%28a%2Bb%29%2Fb\"
\n" ); document.write( "\"10b=6a%2B6b\"
\n" ); document.write( "\"4b=6a\"
\n" ); document.write( "\"2b=3a\"
\n" ); document.write( "\"2%28db%2Fdt%29=3%28da%2Fdt%29\"
\n" ); document.write( "\"2%282%29=3%28da%2Fdt%29\"
\n" ); document.write( "\"da%2Fdt=4%2F3\"\"fps\"\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );