A person moves 100 m east, then 50 m west and finally 20 m south. How much distance he travelled?

Options

A. 120 m
B. 170 m
C. 100 m
D. 50 m

Explanation

To find out how much distance the person traveled, we can break down the movements step by step.

### Step 1: Identify the distances traveled in each direction.
- The person first moves **100 meters east**.
- Then, the person moves **50 meters west**.
- Finally, the person moves **20 meters south**.

### Step 2: Calculate the total distance traveled.
To find the total distance, we simply add up all the distances traveled in each segment:

1. Distance traveled east: **100 meters**
2. Distance traveled west: **50 meters**
3. Distance traveled south: **20 meters**

Now, we add these distances together:

\[ \text{Total Distance} = 100 \, \text{meters (east)} + 50 \, \text{meters (west)} + 20 \, \text{meters (south)} \]

\[ \text{Total Distance} = 100 + 50 + 20 = 170 \, \text{meters} \]

### Conclusion:
The total distance traveled by the person is **170 meters**.

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