Question

length of a rectangle is 16 cm less than twice its breadth. If the perimeter of a rectangle is 100 cm fid its length and breadth

Answer 1

let the length of rectangle be x
breadth be y

x = 16-y
perimeter = 2(x+y)
put value of x in 2(x+y)

Answer 2

let breadth=x
let length=2x-16
perimeter =100cm
perimeter=2 (l+b)
=2 (x+2x-16) = 2 (x-16)=2x-32
perimeter=2x-32
100=2x-32
2x=100+32
2x=132
x=132/2
x=66
breadth=x=66cm
length=2x-16=2×66-16=132-16=116cm