Question

find the length and breadth of the rectangle given below if its perimeter is 72m

Answer 1

2l + 2b = 72m
2 (5x+4)+2 (x-4)=72m
10x +8+2x-8=72
12x = 72
X = 5
Length = 5×5+4=29
Breadth = 5-4 =1

Answer 2

Perimeter=2(l+b) = 2(5x+4 + x-4)= 72
12x=72
So x= 6
So length= 5x+4= 34
And breadth= x-4 = 2