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:
Choose the correct option.
A) 7 Kmph	B) 8 Kmph	C) 10 Kmph	D) 12 Kmph	E) None of these
Explanation:   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   7 Kmphnswer: Option 7 Kmph
<result>A</result>
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: