Find the areas of the rectangles whose sides are: (a) 3 cm and 4 cm (b) 12 m and 21 m (c) 2 km and 3 km (d) 2 m and 70 cm

(a) Area of rectangle = length x breadth
= 3 cm x 4 cm = 12 cm²
(b) Area of rectangle = length x breadth
= 12 m x 21 m = 252 m²
(c) Area of rectangle = length x breadth
= 2 km x 3 km = 6 km²
(d) Area of rectangle = length x breadth
= 2 m x 70 cm = 2 m x 0.7 m = 1.4 m²

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