document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=55439>Question 55439</A>: <I><SPAN STYLE=\"word-break: break-all;\"> To whom may it concern,\r<BR>\n" );
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document.write( "I have problem to do this question.\r<BR>\n" );
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document.write( "The heights of three plants A, B and C in a garden are in the ratio of 2:3:5.  Their mean height is 30 cm.<BR>\n" );
document.write( "(a)	Find the height of plant B<BR>\n" );
document.write( "(b)	If another plant D is added to the garden and the mean height of the four plants is now 33 cm, find the height of plant D.\r<BR>\n" );
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document.write( "Please help. Thank you so much.\r<BR>\n" );
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document.write( "CH Lam </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #37615 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=37615\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The heights of three plants A, B and C in a garden are in the ratio of 2:3:5. Their mean height is 30 cm.<BR>\n" );
document.write( "(a) Find the height of plant B<BR>\n" );
document.write( "(b) If another plant D is added to the garden and the mean height of the four plants is now 33 cm, find the height of plant D. <BR>\n" );
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document.write( "Heights are:<BR>\n" );
document.write( "A : 2x<BR>\n" );
document.write( "B : 3x<BR>\n" );
document.write( "C ; 5x<BR>\n" );
document.write( "Average height is 30 cm<BR>\n" );
document.write( "Add them up and divide by 3 to get 30.<BR>\n" );
document.write( "(2x+3x+5x)/3 = 30<BR>\n" );
document.write( "Solve for \"x\".<BR>\n" );
document.write( "10x=90<BR>\n" );
document.write( "x=9<BR>\n" );
document.write( "Determine B's height:<BR>\n" );
document.write( "B=3x=3(9)= 27 cm<BR>\n" );
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document.write( "Figure the height of A and C<BR>\n" );
document.write( "A=2x=18<BR>\n" );
document.write( "C=5x=45<BR>\n" );
document.write( "Add A,B,C, and D and divide by 4 to get 33<BR>\n" );
document.write( "(18+27+45+D)/4=33<BR>\n" );
document.write( "90+D=132<BR>\n" );
document.write( "D=42 cm.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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