Sun Jan 30, 2011 6:24 am by tartle 


A person crosses a river on a paddle boat.
He took 4 hours while paddling against the water flow
and 3 hours while paddling in the direction of the water flow.
On still waters, how long would he take? 




Fri Mar 18, 2011 5:15 pm by ChibiHoshi 


Assuming the distances are all equal and they cancel each other out
Rower+River=3 hours
RowerRiver=4 hours
Basic algebra
2xRower=7
Rower alone takes 3.5 hours 




Tue Jul 12, 2016 6:43 am by Dzallen 


The correct equations (rower and river representing respective speeds) would be:
rower+river=distance/3
rowerriver=distance/4
2*rower=7*distance/12
time=distance/rower=24/7=~3.43 hours 






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