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, we first need to convert the length of the garden edging from millimeters to meters for consistency.

1. **Convert 1800 mm to meters**:
   \[
   1800 \, \text{mm} = 1.8 \, \text{m}
   \]

2. **Divide the total perimeter by the length of one piece of edging**:
   \[
   \frac{14 \, \text{m}}{1.8 \, \text{m}} = 7.78
   \]

   This means you would need 7.78 lengths of garden edging. Since you can't buy a fraction of a length, you'll need to round up to the nearest whole number.

3. **Round up to the nearest whole number**:
   \[
   \lceil 7.78 \rceil = 8
   \]

So, you will need to buy **8 lengths** of garden edging.

Would you like more details or have any questions?

Here are 5 related questions to deepen your understanding:
1. How would the calculation change if the perimeter was 20m instead of 14m?
2. What if the garden edging came in 2m lengths instead of 1.8m?
3. How would you calculate the cost if each length of garden edging costs $10?
4. How much garden edging would be left over if the perimeter was only 13m?
5. How would the calculation be affected if the garden was circular instead of having a simple perimeter?

**Tip**: Always remember to check if the units are consistent when doing any calculations!

Learn how to calculate the number of garden edging lengths required for a garden with a 14m perimeter using 1800mm lengths. This problem covers unit conversion, division, and rounding, making it suitable for Grades 5-7.

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