document.write( "Question 1155424: A circular planetary ring of radius 135000 km completes one full revolution in 190000 hours.
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Algebra.Com's Answer #778004 by ikleyn(52876)\"\" \"About 
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document.write( "First, the standard and common name for \"a circular planetary ring\" is \"an orbit\".\r\n" );
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document.write( "Second, to answer first question, divide  \"2pi\"  radians  (full angle, or complete angle, or one full rotation angle) by 190000 hours.\r\n" );
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document.write( "And finally, the linear velocity is the circumference of the circle (= the length of the orbit)  \"2pi%2AR\" = \"2%2A3.14%2A135000\" kilometers,\r\n" );
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document.write( "divided by the time of one rotation 190000 hours.\r\n" );
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document.write( "You do all needed calculations.\r\n" );
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