Question 1150484
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The speed of the boat still in water is 15km/hr it needs four more hour to travel 63km against the currnet of the river than it needs to travel dowen the river determine the speed of the currnet of the river
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The speed of a boat in still  water is 15km/hr. It needs four more hours to travel 63km against the currnet of the river than it needs to travel dowen the river. Determine the speed of the currnet of the river.
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<pre>
               SPEED     TIME         DISTANCE

UP             15-c      63/(15-c)     63

DOWN           15+c     63/(15+c)      63

DIFFERENCE                4
</pre>
Solve for c in   {{{63/(15-c)-63/(15+c)=4}}}.


Not showing the steps here, but  c=6.