Answer:
Given:- the length of a rectangle is triple the width. it's perimeter is more than 40m.
Now, from the given condition we have ,
where l is the length of the rectangle and b is the width of the rectangle.
Perimeter(P) of a rectangle is given by,

Since perimeter is more than 40 m we have,



8b>40
⇒ b>5 m
since,
then

⇒
if we take the integers, the smallest possible values for its length and width ,
m and b=6 m.