1. The length and breadth of a rectangle are 10 cm and 8 cm respectively. Find its perimeter if the length
and breadth are (1) doubled halved.
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Answer:
Area of rectangle = l× b
= 10× 8
80 sq cm
perimeter of rectangle = 2( l+ b )
= 2 ( 10+ 8)
= 2× 18
= 36 unit
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