Answer :
Answer:
Step-by-step explanation:To determine the speed of the boat downstream, you need to add the speed of the boat in still water to the speed of the stream.
Given:
- Speed of the boat in still water: 5 km/hr
- Speed of the stream: 2 km/hr
The formula for the speed of the boat downstream is:
\[ \text{Speed downstream} = \text{Speed of boat in still water} + \text{Speed of stream} \]
Substituting the given values:
\[ \text{Speed downstream} = 5 \text{ km/hr} + 2 \text{ km/hr} = 7 \text{ km/hr} \]
Therefore, the speed of the boat downstream is \( \boxed{7 \text{ km/hr}} \).