Question

Find the areas of the following rectangles. Which rectangle has least area and which one has greatest area ? 

(i) l = 2 m, b = 80 cm 

(ii) l = 180 cm, b = 70 cm 

(iii) l = 200 cm, b = 1 m 

(iv) l = 190 cm, b = 1 m

Answer 1

(i) l = 2 m = 200 cm 

b = 80 cm 

Area = l × b = 200 × 80 

= 16000 sq. cm 

(ii) l = 180 cm 

b = 70 cm 

Area = l × b = 180 × 70 

= 12600 sq. cm 

(iii) l = 200 cm, b = 1 m = 100 cm 

Area = 1 × b = 200 × 100 

= 20000 sq. cm 

(iv) l = 190 cm, b = 1 m = 100 cm 

Area = I × b = 190 × 100 

= 19000 sq.cm 

∵ 20000 > 19000 > 16000 > 12600 

Thus, (iii) rectangle has greatest and (ii) rectangle has least area.