In one hour, a boat goes 12 km along the stream and 8 km against the stream. What is the speed of the boat in still water (in km/h)?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 10.
Speed of the boat in still water = (12 + 8)/2 = 20/2 = 10 km/h
Hence, the boat's speed is 10 km/h.