Q.1 Find the area 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
Area = l × b = 3 × 4 = 12 $$cm^2$$
= 252 $$m^2$$
= 6 $$km^2$$
= 1.40 $$m^2$$