Speed of the boat along the current and against the current are 10 km/h and 8 km/h respectively. What is the speed of the current?
Answer & explanation
Correct answer: option 4
Let speed of current be 's'
Let speed of boat in still warter be 'b'
Speed of boat upstream = 8 km/hr = b-s
Speed of boat downstream = 10 km/hr = b+s
Adding both equations above, we get
2b = 18
b = 9
Thus s = 1
The correct answer is Option (4) → 1