20 sq cm = 20*100 sq mm = 2000 sq mm
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100 sq mm = 1 sq cm
0.10 cm2 * * * * * No! 1 mm = 0.1 cm so 1 sq mm = 0.1*0.1 = 0.01 sq cm
1 sq. cm = 100 sq. mm.
1 sq in = 6.452 sq cm
Area of rectangle = l X b . Here , l=13 cm . 1 cm =10 mm. so, 13 cm =130 mm. b=86 mm. NOw , area = 11180 mm sq.