Dhanush crosses a road 100 metres wide in 50 seconds. His speed in km/hr is: 

📊 Step-by-step Solution

Given:

• Distance = 100 m
• Time = 50 sec

🔹 Step 1: Speed in m/s

Speed = $\frac{\text{Distance}}{\text{Time}} = \frac{100}{50} = 2 \text{ m/s}$

🔹 Step 2: Convert m/s to km/h

👉 Formula: multiply by $\frac{18}{5}$

Speed = $2 \times \frac{18}{5} = \frac{36}{5} = 7.2 \text{ km/h}$

Final Answer:

👉 7.2 km/h / 7.2 किमी/ घंटा