How many metres are there in 2 km 7 hm 5 dm?

Options

A. 2760 m
B. 2750 m
C. 2780 m
D. 2820 m

Answer

To solve the question "How many metres are there in 2 km 7 hm 5 dm?", we will convert each unit to meters and then sum them up.

### Step-by-Step Solution:

1. **Convert kilometers to meters**:
- We know that 1 kilometer (km) is equal to 1000 meters (m).
- Therefore, 2 kilometers can be converted as follows:
\[ 2 \text{ km} = 2 \times 1000 \text{ m} = 2000 \text{ m} \]

2. **Convert hectometers to meters**:
- We know that 1 hectometer (hm) is equal to 100 meters (m).
- Therefore, 7 hectometers can be converted as follows:
\[ 7 \text{ hm} = 7 \times 100 \text{ m} = 700 \text{ m} \]

3. **Convert decameters to meters**:
- We know that 1 decameter (dm) is equal to 10 meters (m).
- Therefore, 5 decameters can be converted as follows:
\[ 5 \text{ dm} = 5 \times 10 \text{ m} = 50 \text{ m} \]

4. **Add all the converted values together**:
- Now, we will sum the values obtained from the conversions:
\[ \text{Total meters} = 2000 \text{ m} + 700 \text{ m} + 50 \text{ m} \]
- Performing the addition:
\[ 2000 + 700 + 50 = 2750 \text{ m} \]

5. **Final Answer**:
- Therefore, the total number of meters in 2 km 7 hm 5 dm is:
\[ \text{Total} = 2750 \text{ m} \]