Question

The perimeter of a rectangle is 84 m. Find its breadth if its length is 20 m.

Answer 1

Perimeter =2(a+b)=84

(20+b)=42

Breadth=22cm

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Answer 2

here is your answer
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perimeter of rectangle = 2( L+B )
perimeter of rectangle = 2L +2B
perimeter of rectangle = 84m
Length =20 m

so, perimeter = 84m = 2*20 + 2B
=84m =40 +2B
= 2B =84m - 40m
=2B = 44m
=B = 44/2
= Breadth = 22m. answer
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hope it will help you buddy..!