Question 882145
Think of the ocean as the fixed reference
The person is traveling at {{{ 50 - 25 = 25 }}} 
km/hr relative to the ocean, and in
the same direction as the ship
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The boat is traveling at {{{ 10 }}} km/hr
relativ to the ocean
The person sees the boat going
{{{ 25 - 10 = 15 }}} km/hr in the 
direction of the ship