document.write( "Question 1204765: It is estimated that a bulldozer can prepare a certain site in 15.0 days and that a
\n" ); document.write( "larger bulldozer can prepare the same site in 11.0 days. If we assume that they do
\n" ); document.write( "not get in each other’s way, how long will it take the two machines, working
\n" ); document.write( "together, to prepare the site? \n" ); document.write( "

Algebra.Com's Answer #841236 by josgarithmetic(39631) $\"\"$ $\"About$

You can put this solution on YOUR website!

\r\n" );
document.write( "                   RATE          TIME            HOW MANY SITES DONE\r\n" );
document.write( "\r\n" );
document.write( "bulldozer          1/15           15              1\r\n" );
document.write( "\r\n" );
document.write( "largerbulldozer    1/11           11              1\r\n" );
document.write( "\r\n" );
document.write( "combined          \r\n" );
document.write( "

\n" ); document.write( "Their combined speed, $\"11%2F%2811%2A15%29%2B15%2F%2811%2A15%29\"$ ;\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The reciprocal of that is how many days to do one site both these bulldozers together. \n" ); document.write( "

\n" );