document.write( "Question 158345: A car travels 100 mph for the first half of a 400 mile race. How fast must the car go to average 200 mph? \n" ); document.write( "
Algebra.Com's Answer #116713 by atique.ah(27)\"\" \"About 
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A car travels 100 mph for the first half of a 400 mile race. How fast must the car go to average 200 mph?\r
\n" ); document.write( "\n" ); document.write( "solution:\r
\n" ); document.write( "\n" ); document.write( "let us first find te time required to complet 400 miles at 200 mp
\n" ); document.write( "400miles/200 miles/hour =2hour.\r
\n" ); document.write( "\n" ); document.write( "as the 2 hours are already consumed there is no way to achieve an average speed
\n" ); document.write( "of 200mph from this point.
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