You need garden edging for a garden with a perimeter of 14m. Garden edging comes in 1800mm lengths. How many lengths will you need to buy to have enough edging for the entire perimeter?

To find out how many lengths of garden edging you need to cover the entire perimeter, you can follow these steps:

1. **Convert the garden edging length to meters**:  
   The edging comes in 1800 mm lengths. To convert this to meters:

   \[
   1800 \text{ mm} = \frac{1800}{1000} = 1.8 \text{ m}
   \]

2. **Determine the number of lengths needed**:  
   Divide the total perimeter by the length of one piece of edging:

   \[
   \text{Number of lengths} = \frac{14 \text{ m}}{1.8 \text{ m}} \approx 7.78
   \]

3. **Round up to the nearest whole number**:  
   Since you can't purchase a fraction of a length, you need to round up to the nearest whole number:

   \[
   \text{Number of lengths} = 8
   \]

Therefore, you will need to buy **8 lengths** of garden edging to cover the entire 14 m perimeter.

Would you like more details or have any questions? Here are some related questions you might find interesting:

1. How would the number of lengths change if the perimeter was 20 m?
2. What would be the cost if each length costs $5?
3. How would you calculate the amount of overlap if the lengths had to be joined with a 10 cm overlap?
4. How many lengths would be needed if the perimeter was given in feet instead of meters?
5. What if the garden was irregular in shape; how would you determine the perimeter?

**Tip:** Always round up when purchasing materials to ensure you have enough for your project!

Learn how to calculate the number of garden edging lengths needed to cover a 14-meter perimeter. This problem covers essential mathematical concepts, including unit conversion from millimeters to meters, division, and rounding. Suitable for students in Grades 6-8.

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