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 determine how many lengths of garden edging you need, follow these steps:

1. The total perimeter of the garden is **14 meters**, which is equal to **14,000 mm** (since 1 meter = 1,000 mm).
2. Each length of garden edging is **1800 mm** long.
3. Now, divide the total perimeter by the length of each piece of edging:

\[
\frac{14,000 \text{ mm}}{1,800 \text{ mm}} = 7.78
\]

Since you can't buy a fraction of a length, you'll need to round up to the nearest whole number. Therefore, you will need to purchase **8 lengths** of garden edging.

Would you like more details or have any questions?

Here are 5 related questions to think about:
1. What if the perimeter were larger, say 20 meters—how many lengths would you need?
2. How much extra garden edging will you have after using 8 lengths?
3. What if the edging came in lengths of 2000mm—how many would you need then?
4. Can you calculate the total cost if each length of edging costs $5?
5. How would the number of lengths change if the perimeter included curves or irregular shapes?

**Tip:** Always round up when dealing with physical quantities like this, as partial pieces usually aren't useful.

Find out how to calculate the number of garden edging pieces needed for a 14m perimeter garden. Using 1800mm lengths of edging, this problem covers unit conversion, division, and rounding concepts, suitable for students in Grades 5-7.

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