document.write( "Question 971433: A takes 45 seconds to do 1 lap. B runs the opposite direction and meets A every 25 seconds. How long does it take for B to do 1 lap? \n" ); document.write( "

Algebra.Com's Answer #593935 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
In $\"+25+\"$ sec, A has run $\"+25%2F45+=+5%2F9+\"$ of a lap
\n" ); document.write( "That means B, going in the opposite direction, has
\n" ); document.write( "run $\"+4%2F9+\"$ of a lap.
\n" ); document.write( "--------------------
\n" ); document.write( "So, B's rate is $\"+4%2F9+\"$ of a lap in $\"+25+\"$ sec
\n" ); document.write( " $\"+d+=+r%2At+\"$
\n" ); document.write( " $\"+1+=+%28%28+4%2F9+%29+%2F+25+%29%2At+\"$
\n" ); document.write( " $\"+25+=+%28+4%2F9+%29%2At+\"$
\n" ); document.write( " $\"+225+=+4t+\"$
\n" ); document.write( " $\"+t+=+56.25+\"$
\n" ); document.write( "B does 1 lap in 56.25 sec
\n" ); document.write( "------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+1+=+%28%28+4%2F9+%29+%2F+25+%29%2At+\"$
\n" ); document.write( " $\"+1+=+%28%28+4%2F9+%29+%2F+25+%29%2A56.25+\"$
\n" ); document.write( " $\"+1+=+%28+.4444+%2F+25+%29%2A56.25+\"$
\n" ); document.write( " $\"+1+=+.01777%2A56.25+\"$
\n" ); document.write( " $\"+1+=+.9999956+\"$
\n" ); document.write( "eror due to rounding off\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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