(i) l = 40 cm, b = 15 cm
Perimeter = 2 (l + b)
= 2 (40 + 15) = 2 (55) = 110 cm
Area = l × b = 40 × 15 = 600 sq. cm
(ii) l = 45 cm, b = 20 cm
Perimeter = 2 (l + b)
= 2 (45 + 20) = 2 × 65 = 130 cm
Area = l × b = 45 × 20 = 900 sq. cm
(iii) l = 8 cm, b = 7 cm
Perimeter = 2 (l + b) = 2 (8 + 7)
= 2 (15) = 30 cm
Area = l × b = 8 × 7 = 56 sq. cm
(iv) l = 10 cm, b = 5 cm
Perimeter = 2 (l + b)
= 2 (10 + 5) = 2 × 15 = 30 cm
Area = l × b = 10 × 5 = 50 sq. cm
Rectangles with same perimeter = (iii) and (iv)
No. rectangle is same in area Thus, rectangle (iii) and (iv) have same perimeter and different area.