Posted by **lawrence** on Friday, October 15, 2010 at 11:21pm.

a patrol boat took 2.5 hours for a round trip 12km upriver and 12km back. the speed of the current was 2 km/h. what was the speed of the boat in still water?

ps: i just need to know how to make equations from the question above. it's supposed to create equation, then use the quadratic formula to solve and find the answer.

thank you!

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