In 1 hour, a boat goes 5 km along the stream and 5 km against the stream. The speed of the boat in still water (in km/hr) is : Choose the correct choice from the following
A) 3 km/hr.
B) 2 km/hr.
C) 6 km/hr.
D) 8 km/hr.
E) 5 km/hr.
Speed in still water = 1/2(5 + 5) km/hr   = 5 km/hr. ANSW5 km/hr.R :5 km/hr.
<result>E</result>
In 1 hour, a boat goes 5 km along the stream and 5 km against the stream. The speed of the boat in still water (in km/hr) is :