Question

the premetre of a rectangular frame is 500cm. if its length is 190 find its breadth

Answer 1

let breadth =b
perimeter =2 (l+b)
now
500=2 (b +190)
500-380=2b
120/2=b
60=b
so breadth is 60

Answer 2

2(l+b) = Perimeter
l = 190
perimeter = 500cm

2(190+ b) = 500
190 + b = 500/2
190 + b = 250
b = 250 -190
= 60 Cm