document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=549015>Question 549015</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You are stationed at a radar base and you observe an unidentified airplane at an alititude of 6000 meters. The plane is flying towards the radar base at an angle of elevation of 30 degrees. After exactly one minute, the radar sweep reveals that the plane is now at an angle of elevation of 60 degrees and it is maintaining the same altitude. What is the speed of the plane in meters per second? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #357465 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=357465\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  an unidentified airplane at an alititude of 6000 meters.<BR>\n" );
document.write( " The plane is flying towards the radar base at an angle of elevation of 30 degrees.<BR>\n" );
document.write( " After exactly one minute, the radar sweep reveals that the plane is now at an angle of elevation of 60 degrees and it is maintaining the same altitude.<BR>\n" );
document.write( " What is the speed of the plane in meters per second?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Use the tangent of the angle to find the distance (d) to a point directly below plane:<BR>\n" );
document.write( "when the angle is 30 degrees<BR>\n" );
document.write( "tan(30) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6000%2Fd ALIGN=MIDDLE  ALT=\"6000%2Fd\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d1 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6000%2Ftan%2830%29 ALIGN=MIDDLE  ALT=\"6000%2Ftan%2830%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d1 = 10392.3 meters<BR>\n" );
document.write( "when the angle is 60 degrees<BR>\n" );
document.write( "tan(60) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6000%2Fd ALIGN=MIDDLE  ALT=\"6000%2Fd\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d2 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6000%2Ftan%2860%29 ALIGN=MIDDLE  ALT=\"6000%2Ftan%2860%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d2 = 3464.1 meters<BR>\n" );
document.write( ":<BR>\n" );
document.write( "d1 - d2 = distance traveled by aircraft in 1 min<BR>\n" );
document.write( "10392.3 - 3464.1 = 6928.2 m/min<BR>\n" );
document.write( "convert to m/sec<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6928.2%2F60 ALIGN=MIDDLE  ALT=\"6928.2%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 115.47 m/sec<BR>\n" );
document.write( ":<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );