Perimeter of rectangular frame = Length of the aluminium strip
⇒ 2(length + breadth) = 40 cm
⇒ length + breadth = 40/2 cm = 20 cm
∴ The possible measurement of rectangular frames are 1 cm × 19 cm, 2 cm × 18 cm, 3 cm × 17 cm, 4 cm × 16 cm, 5 cm × 15 cm, 6 cm × 14 cm, 7 cm × 13 cm, 8 cm × 12 cm, 9 cm × 11 cm, 10 cm × 10 cm