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 are needed, follow these steps:

1. Convert the length of the garden edging from millimeters to meters:
   \[
   1800 \, \text{mm} = \frac{1800}{1000} = 1.8 \, \text{meters}
   \]

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

3. Since you can't buy a fraction of a length, round 7.78 up to the next whole number, which is 8.

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

Would you like further details or have any questions?

Here are 5 related questions:
1. How would the answer change if the perimeter was 20 meters?
2. What if the garden edging lengths were 2000 mm instead of 1800 mm?
3. How much garden edging would be left over after covering the perimeter?
4. How would you calculate the cost if each length of edging has a price?
5. What would be the total length of edging if you buy 10 lengths?

**Tip:** Always convert all measurements to the same units before doing any calculations to avoid errors.

Learn how to calculate the number of garden edging lengths required for a garden with a 14-meter perimeter using 1800mm lengths. This solution involves unit conversion from millimeters to meters, division, and rounding. Suitable for students in Grades 5-7.

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