document.write( "Question 30760: the area of a circke varies directly as the square of its radius. a circle of radius 5 inches has area 78.5 square inches. find the area to the nearest tenth of a circle of radius 7 inches. \n" ); document.write( "
Algebra.Com's Answer #17474 by ikdeep(226)\"\" \"About 
You can put this solution on YOUR website!
this question can be directly solved by applying the formula...\r
\n" ); document.write( "\n" ); document.write( "area of circle = ∩(pie) r^2\r
\n" ); document.write( "\n" ); document.write( " = 22/7 * (7)^2\r
\n" ); document.write( "\n" ); document.write( " = 22/ 7 * 49\r
\n" ); document.write( "\n" ); document.write( " = 22 * 7 \r
\n" ); document.write( "\n" ); document.write( " = 154 square inches\r
\n" ); document.write( "\n" ); document.write( "but I think your question demands to apply direct variation method here ...so if we find it by direct variation then we get equation...\r
\n" ); document.write( "\n" ); document.write( "(5)^2 /78.5 =(7)^2 / x [x here is area of circle which u wish to find out]\r
\n" ); document.write( "\n" ); document.write( "on solving it we get x = 153.86 or 154 (appoximately)\r
\n" ); document.write( "\n" ); document.write( "Still if you won't be able to solve further, contact me again. \r
\n" ); document.write( "\n" ); document.write( "hope this will help you \r
\n" ); document.write( "\n" ); document.write( "Please feel free to revert back for any further queries.
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