1.

In an hour a boat goes 10 Km along the stream and 4 Km against the stream. The speed of the boat in still water (in Kmph) is:

Answer»

7 KMPH



Let the speed of stream = X Kmph 

and the speed of WATER = 8 Kmph 

X + Y = 10 

X - Y = 4 

X = 7, Y = 3 

Speed of stream = 7 Kmph



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