Question 204027
velocity  =  distance / Time,,,,or  t=d/v
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d/v1 = 5,,,,,300/(s+w) =5,,,,300=5(s+w) = 5s +5w
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d/v2 = 8,,,,,300/(s-w) =8,,,,,300 = 8(s-w) = 8s-8w
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multiply  first  by 8,,,and  2nd  by  5
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2400=40s +40w
1500=40s-40w
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adding  together
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3900 = 80s
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48.75 = s
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substituting  in  first  eqn ,,,300 =5(48.75) +5w,,,,w=11.25
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checking, 300/ (48.75 +11.25) = 5,,,ok
300/(48.75-11.25) = 8,,,ok