document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=305011>Question 305011</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My friend and i have been working on this math problem and we can't seem to figure it out. We were wondering if someone could help us? Please and Thank You!! We would deeply apprecaite it!!\r<BR>\n" );
document.write( "\n" );
document.write( "Spheres<BR>\n" );
document.write( "About two cans of paint are needed to cover the hemispherical dome of the silo. Approximatley how many cans are needed to paint the rest of the silo's exterior? the height is 20m from the bottom to the top of the cylinder and the base is 10m </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #218430 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=218430\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> About two cans of paint are needed to cover the hemispherical dome of the silo. Approximatley how many cans are needed to paint the rest of the silo's exterior? the height is 20m from the bottom to the top of the cylinder and the base is 10m<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Surface area of hemispherical dome:<BR>\n" );
document.write( "Area of a sphere = 4(pi)r^2<BR>\n" );
document.write( "For the hemispherical dome it is simply half of the area above:<BR>\n" );
document.write( "(1/2)4(pi)r^2 = 2(pi)r^2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "radius (r) is half the base = 10/2 = 5 m<BR>\n" );
document.write( ".<BR>\n" );
document.write( "area of hemispherical dome = 2(pi)r^2<BR>\n" );
document.write( "area of hemispherical dome = 2(3.14)5^2<BR>\n" );
document.write( "area of hemispherical dome = (3.14)50<BR>\n" );
document.write( "area of hemispherical dome = 157 square meters<BR>\n" );
document.write( ".<BR>\n" );
document.write( "This means 2 cans of paint per 157 square meters.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Area of the rest of the silo:<BR>\n" );
document.write( "\"circumference\" * \"height<BR>\n" );
document.write( "2(pi)rh<BR>\n" );
document.write( "2(3.14)(5)(20)<BR>\n" );
document.write( "(3.14)(200)<BR>\n" );
document.write( "628 square meters<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Finally, determine the number of cans needed:<BR>\n" );
document.write( "628/157 = 4 cans of paint\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );