What is the area of the frame bordering a 29×42 cm picture if its width is 40mm?

1. Frame width 40 mm. This is 4 cm. First, we find the length of the entire structure. To do this, add the width of the frame to the length of the picture:
42 + 4 = 46 (cm).
2. Next, we calculate the width of the entire structure. To do this, add the width of the frame to the width of the picture:
29 + 4 = 33 (cm).
3. Now you can find the total area:
46 x 33 = 1518 (cm²).
4. Find the area of the picture:
42 x 29 = 1218 (cm²).
5. It remains to calculate the area of the frame. To do this, subtract the area of the painting from the total area:
1518 – 1218 = 300 (cm²).
Answer: The area of the frame bordering the picture is 300 cm².