Question : A ship goes at 18 km/hr downstream and at 16 km/hr upstream. What will be the speed of the ship in still water?
Option 1: 14 km/hr
Option 2: 17 km/hr
Option 3: 16 km/hr
Option 4: 15 km/hr
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Correct Answer: 17 km/hr
Solution :
Given:
A ship goes at 18 km/hr downstream and at 16 km/hr upstream.
Let the speed of the ship be
So, at downstream
At upstream
Solving both equations, we get
So, the speed of the ship in still water is 17 km/hr.
Hence, the correct answer is 17 km/hr.
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