Question 1165518
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A boat traveled downstream a distance of 48 miles and then came right back. If the speed of the current was 12 mph and the total trip took 5 hours and 20 mins, find the average speed of beat relative to water.
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A boat traveled downstream a distance of d miles and then came right back. If the speed of the current was c mph and the total trip took t hours, find the average speed r, of beat relative to water.
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<pre>
The unknown variable is r, and the other variables are for given values.

            SPEED       TIME         DISTANCE

DOWNST      r+c         d/(r+c)       d

UPSTR       r-c         d/(r-c)       d

TOTAL                    t
</pre>
Solve this equation for r;


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