document.write( "Question 734810: A man can dig a ditch in 3 hours and his daughter can dig the same size ditch in 5 hours. Working together, how long will it take them to dig the ditch? \n" ); document.write( "
Algebra.Com's Answer #449158 by checkley79(3341)\"\" \"About 
You can put this solution on YOUR website!
1/3+1/5=1/X
\n" ); document.write( "(5+3)/3*5=1/X
\n" ); document.write( "8/15=1/X CROSS MULTIPLY.
\n" ); document.write( "8X=15
\n" ); document.write( "X=15/8
\n" ); document.write( "X=1.875 HOURS WORKING TOGETHER.
\n" ); document.write( "
\n" );