document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1190088>Question 1190088</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two boys can mow a lawn in 2 hours and 30 minutes. If they are joined by three other boys, how many hours will it take to mow the lawn?<BR>\n" );
document.write( "A)1 hr  B) 1 1/4 hrs  C)1 1/2 hrs  D)1 3/4 hrs  E) 2 hrs<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #821646 by </B><A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><B>math_tutor2020(3817)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_tutor2020><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=821646\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=black size=3><BR>\n" );
document.write( "1 hr = 60 min<BR>\n" );
document.write( "2 hr = 120 min<BR>\n" );
document.write( "2 hr, 30 min = 120 min + 30 min = 150 min\r<BR>\n" );
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document.write( "Let's say the lawn has a total area of 300 sq ft<BR>\n" );
document.write( "Each boy will handle 300/2 = 150 sq ft\r<BR>\n" );
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document.write( "Each individual has a unit rate of<BR>\n" );
document.write( "rate = (amount done)/(time)<BR>\n" );
document.write( "rate = (150 sq ft)/(150 min)<BR>\n" );
document.write( "rate = 1 sq ft per min\r<BR>\n" );
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document.write( "Assume that the 3 other boys will have the same unit rate<BR>\n" );
document.write( "If so, then the combined rate of all five boys is 5 sq ft per min. This assumes that no person hinders another.\r<BR>\n" );
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document.write( "rate = (amount done)/(time)<BR>\n" );
document.write( "rate*time = amount done<BR>\n" );
document.write( "time = (amount done)/(unit rate)<BR>\n" );
document.write( "time = (300 ft^2)/(5 sq ft per min)<BR>\n" );
document.write( "time = 60 min<BR>\n" );
document.write( "time = 1 hour\r<BR>\n" );
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document.write( "Answer: A) 1 hour<BR>\n" );
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