A car travelled 60 km to the north of Patna and then 90 km to south from there. How far from Patna was the car finally ?

Answer

To solve the problem step by step, we can follow these instructions:

### Step 1: Understand the Directions
The car travels in two directions: first to the north and then to the south.

### Step 2: Calculate the Distance Traveled North
The car travels 60 km to the north of Patna. We can represent this distance as:
- North distance = +60 km

### Step 3: Calculate the Distance Traveled South
Next, the car travels 90 km to the south. We can represent this distance as:
- South distance = -90 km

### Step 4: Combine the Distances
Now, we need to find the total distance from Patna by combining the distances traveled north and south. We can do this by adding the two distances:
- Total distance from Patna = North distance + South distance
- Total distance from Patna = +60 km + (-90 km)

### Step 5: Perform the Calculation
Now, we perform the calculation:
- Total distance from Patna = 60 km - 90 km
- Total distance from Patna = -30 km

### Step 6: Interpret the Result
The negative sign indicates that the car is 30 km to the south of Patna. Therefore, the final distance from Patna is:
- Distance from Patna = 30 km to the south

### Final Answer
The car is 30 km south of Patna.

---