Question

The perimeter of a rectangle is equal to that of a square with side 14m. If the rectangle is 15 m long, what is its breadth?

Answer 1

perimeter of rectangle=2l+2b
perimeter of square=4 s
perimeter of rectangle =perimeter of square
2l+2b=4s
l+b=2s
15+b=28
b=13

Answer 2

perimeter of square = 4 l

= 4 x 14 = 56
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perimeter of rectangle = 2l +2b

56 = 2(15) + 2b

56-30 = 2b

b= 13