3. If the length and breadth of the rectangle are 42 cm by 30 cm respectively, find the area and
perimeter.
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Answer:
Area of rectangle= l × b
= 42 × 30 = 1260 cm square
Perimeter of rectangle = 2 (l+b)
= 2 ( 42 + 30 )
= 2 × 72
= 144 cm
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