Question 763130
Let the breadth (width) be x metres. 

As width is one third of length, the length will be 3x metres. 

Perimeter of a rectangle = {{{2(l+b)}}}

So, perimeter = {{{2*(x+3x)}}} = {{{2*4x = 8x metres}}}

It is given that perimeter is 88m.

So, 8*x = 88

{{{x=11 metres.}}}

So, dimensions are 11m and 11*3 = 33m.

Length = 33m, Width = 11m

:)