document.write( "Question 543175: Anza is training by running to a post across a field and then back. He runs the outward leg at 7m/s and the return leg at 5m/s. He takes 15.4 s. Find the distance to the post \n" ); document.write( "

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Anza is training by running to a post across a field and then back. He runs the outward leg at 7m/s and the return leg at 5m/s. He takes 15.4 s. Find the distance to the post.
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\n" ); document.write( "let x=time (sec) it took for outward leg
\n" ); document.write( "15.4-x=time (sec) it took for return leg
\n" ); document.write( "distance=speed*time (same for both legs)
\n" ); document.write( "7x=5(15.4-x)
\n" ); document.write( "7x=77-5x
\n" ); document.write( "12x=77
\n" ); document.write( "x=77/12 sec
\n" ); document.write( "distance=7x=7(77/12)≈44.92
\n" ); document.write( "ans:
\n" ); document.write( "Distance to post≈44.92 m \n" ); document.write( "

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