the speed of the current is 1/4 the speed of boat in still water. it takes 8 hours to row to point B from point A and back to point B. The distance between point A and point B is 45 km. what is the speed of boat in still water ?
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45/(x +1x/4) + 45/(x-1x/4x)=8
45×4/5x + 45×4/3x =8
36/x + 60/x =8
96/8=x
12 =x
speed of boat is 12km /hr.....
45×4/5x + 45×4/3x =8
36/x + 60/x =8
96/8=x
12 =x
speed of boat is 12km /hr.....
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