Question

the perimeter of a rectangle is 28 CM the length of the rectangle is 9 cm find its breadth​

Answer 1

perimeter=2(l+b)

28=2(9+b)

14=9+b

b=14-9

breadth =5 cm

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Answer 2

perimeter of rectangle =28cm

length of rectangle=9cm

breadth of rectangle= perimeter of rectangle / length of rectangle=28/9 =3.17

I don't know it's right or wrong because I am weak in maths