document.write( "Question 1199528: A steel bar with a radius of 6 inches is being ground in a lathe. The surface speed of the bar is 29 ft/min.How many revolutions will the bar make in 51 sec? \n" ); document.write( "

Algebra.Com's Answer #833456 by ikleyn(52855) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "A steel bar with a radius of 6 inches is being ground in a lathe.
\n" ); document.write( "The surface speed of the bar is 29 ft/min. How many revolutions will the bar make in 51 sec?
\n" ); document.write( "~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "Let n be the number of revolutions per minute.\r\n" );
document.write( "\r\n" );
document.write( "The diameter of the bar is d = 2*6 inches = 12 inches = 1 ft.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The surface speed of 29 ft/min is  the circumference   times the number \r\n" );
document.write( "of revolution per minute, so we have this equation\r\n" );
document.write( "\r\n" );
document.write( "    29 = .\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "From this equation \r\n" );
document.write( "\r\n" );
document.write( "    n =  = 9.231  revolutions per minute.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The number of revolution in 51 seconds is   = 7.846   (rounded).    ANSWER\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );