paint costs $7 for a tin which covers 25m2 how much will it cost to paint (only buy whole tins of paint)

To determine the cost of painting the wall, we need to calculate the number of paint tins required and then multiply by the cost per tin.

1. **Total area to be painted:** $ 249 \, \text{m}^2 $

2. **Coverage per tin of paint:** $ 25 \, \text{m}^2 $

First, calculate the number of tins needed:
\[ \text{Number of tins} = \frac{\text{Total area}}{\text{Coverage per tin}} = \frac{249 \, \text{m}^2}{25 \, \text{m}^2/\text{tin}} \approx 9.96 \]

Since we can only buy whole tins, we need to round up to the next whole number:
\[ \text{Number of tins required} = 10 \]

Next, calculate the total cost:
\[ \text{Cost per tin} = \$7 \]
\[ \text{Total cost} = \text{Number of tins} \times \text{Cost per tin} = 10 \times \$7 = \$70 \]

Therefore, the total cost to paint the wall will be **$70**.

Would you like any more details or have any questions? Here are some questions you might want to ask:

1. How do you determine the number of tins needed for a given area?
2. Why do we need to round up when buying whole tins of paint?
3. How can we minimize paint waste in such projects?
4. What other factors could affect the total cost of painting?
5. Are there more efficient ways to calculate paint requirements for complex shapes?

**Tip:** When planning a painting project, always consider buying a little extra paint to account for any mistakes or touch-ups that may be needed later.

Learn how to calculate the total cost of painting a wall when each paint tin costs $7 and covers 25m2. This problem involves arithmetic calculations and understanding measurement units. Suitable for students in Grades 4-6.

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