Answer:

The perimeter of a rectangle is 96 m. Its length is 3 times its width. What is its length and breadth?

2.(3x+x)=96

or. 8x=96. = > x=12

Length =3×12 =36 m. Width = 12 m.

( another method )

Perimeter of rectangle :

2 (l + w) = 96 metres

length = 3 * width or l = 3w

rewrite :

2 (3w + w) = 96

8w = 96, w = 12

l = 3w = 3*12 = 36

width : 12 metres

length : 36 metres

Answer:

length = 36, breadth = 12

Step-by-step explanation:

l = 3x

b = x

perimeter of rectangle = 2(l+b) = 96

2(3x+x)= 96

4x = 96/2

4x = 48

x= 48/4

x = 12

3x = 12*3 = 36