document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1131129>Question 1131129</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Bob can plant a garden by her self in 10 hours. When her son Andrew helps her the total time it takes them to plant the garden is 4 hours. How long would it take Andrew to plant the garden himself </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #747761 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=747761\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Here is an alternative to the standard method for solving \"working together\" problems that the other two tutors have shown.<br><BR>\n" );
document.write( "Consider the least common multiple of the two times given, 4 hours and 10 hours.  The least common multiple is 20 hours.<br><BR>\n" );
document.write( "Bob can plant a garden in 10 hours, so in 20 hours she can plant 2 of those gardens.<br><BR>\n" );
document.write( "Together, Bob and her son Andrew can plant the garden in 4 hours, so in 20 hours together they could plant 5 of those gardens.<br><BR>\n" );
document.write( "So in those 20 hours Bob can plant 2 of the gardens, and Bob and Andrew together can plant 5 of them; that means in 20 hours Andrew alone can plant 3 of them.<br><BR>\n" );
document.write( "And so the time Andrew alone takes to plant the one garden is 20/3 hours, or 6 2/3 hours. </SPAN>\n" );
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