In a bar graph, 0.2 cm length of a bar represents 100 people . What is the length of bar which represents 1300 people ?

Answer

To find the length of the bar that represents 1300 people in a bar graph where 0.2 cm represents 100 people, we can use the unitary method. Here’s the step-by-step solution:

### Step 1: Understand the given information
We know that:
- 0.2 cm of the bar represents 100 people.

### Step 2: Find the length of the bar for 1 person
To find out how much length represents 1 person, we can set up a proportion:
\[ \text{Length for 1 person} = \frac{0.2 \text{ cm}}{100 \text{ people}} = 0.002 \text{ cm/person} \]

### Step 3: Calculate the length for 1300 people
Now, to find the length of the bar that represents 1300 people, we multiply the length per person by the number of people:
\[ \text{Length for 1300 people} = 1300 \text{ people} \times 0.002 \text{ cm/person} \]

### Step 4: Perform the multiplication
Calculating the above expression:
\[ 1300 \times 0.002 = 2.6 \text{ cm} \]

### Conclusion
Thus, the length of the bar that represents 1300 people is **2.6 cm**.

---