document.write( "Question 1173954: There was a traffic jam caused by a traffic accident. In a period of time, the length of the traffic jam increased by 25% to 4km. Find the increase in length of the traffic jam during that period. \n" ); document.write( "
Algebra.Com's Answer #799279 by Theo(13342)\"\" \"About 
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let x = the original length of the traffic jam.
\n" ); document.write( "x + .25 * x = 1.25 * x = 4
\n" ); document.write( "solve for x to get x = 4 / 1.25 = 3.2.
\n" ); document.write( "that's the length of the traffic jam before the period of time that it increased.
\n" ); document.write( "the increase was 4 - 3.2 = .8
\n" ); document.write( "that's your answer.
\n" ); document.write( ".25 * 3.2. = .8 + 3.2 = 4
\n" ); document.write( "solution is confirmed to be good.
\n" ); document.write( "solution is .8 kilometers increase in the period of time.
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