Correct Answer - Option 2 : 1950 m

**Given:**

Speed of boat in still water = 17 km/h

Speed of the stream = 4 km/h

Time taken = 540 seconds

**Formulas Used:**

Speed = Distance/Time

1 km = 1000 meter

S_{(upstream)} = S_{(boat in still water)} - S_{(stream)}

**Calculation:**

S_{(upstream)} = S_{(boat in still water)} - S_{(stream)}

⇒ S_{(upstream)} = (17 – 4)

⇒ S_{(upstream)} = 13 km/hr

Speed = Distance/Time

⇒ Distance = Speed x Time

⇒ Distance = 13 x (540/3600) = 1.95 km = 1950 meter

**∴** **The distance travelled downstream is 1950 meter.**

Conversion of Time from seconds to hours

1 second = (1/3600) hour** **