document.write( "Question 353794: Two roads diverge from a point at an angle 120. two persons starting from the point walk along roads at 3km and 2km per hour. Find the distance between them? \n" ); document.write( "

Algebra.Com's Answer #252927 by Alan3354(69443) $\"\"$ $\"About$

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Two roads diverge from a point at an angle 120. two persons starting from the point walk along roads at 3km and 2km per hour. Find the distance between them?
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\n" ); document.write( "Use the Cosine Law:
\n" ); document.write( " $\"c%5E2+=+a%5E2+%2B+b%5E2+-+2abcos%28C%29\"$
\n" ); document.write( " $\"c%5E2+=+4+%2B+9+-+2%2A3%2Acos%28120%29\"$
\n" ); document.write( " $\"c%5E2+=+13+%2B+3\"$
\n" ); document.write( "c = 4 km/hr
\n" ); document.write( "c increases at 4 km/hr
\n" ); document.write( "c = 4t km, t in hours
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