**Question:**

A swimmer can swim a distance of 36 kilometer in the direction of water current in the same time,which he requires to swim 36 kilometer in the opposite direction of water current in stream if in stil water swimmer has speed of 12 kilometer per hour more than the speed of that of water in stream then what is the speed of water?

**Option A):**

18 km/h**Option B):**

9 km/h**Option C):**

3 km/h**Option D):**

12 km/h

**Correct Answer is Option C):**

3 km/h