Question

find the breadth of a rectangle is with parameter is 144 cm and its length is 30 cm​

Answer 1

Answer:

perimeter = 144

lenght = 30

breadth = x

perimeter = 2(l+b)

144 = 2(30 + x)

144 = 60 +2x

144-60 =2x

84 = 2x

84/2 = x

42 = x

breadth = 42

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Answer 2

Answer:

perimeter = 144

lenght = 30

breadth = x

perimeter = 2(l+b)

144 = 2(30 + x)

144 = 60 +2x

144-60 =2x

84 = 2x

84/2 = x

42 = x

breadth = 42