Homework Help: algebra

Posted by Josie on Thursday, March 14, 2013 at 8:13pm.

A boat can travel 16 km/h against the current.The same boat can travel 30 km/h with the current.find the rate of the boat in still water and the rate of the current.
Could someone help me.it seams like an easy problem, but I am not getting there.Thank YU very much.

algebra - Reiny, Thursday, March 14, 2013 at 8:35pm
speed of boat in still water ---- x km/h
speed of current ------- y km/h

x+y = 30
x-y = 16
add them
2x = 46
x = 23
then y = 7

speed in still water is 23 km/h, speed of current is 7 km/h

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