Question

if the length of a rectangular field is one - third of its breadth and the perimeter is 120m , then find the length of the field​

Answer 1

Answer:

15m

Step-by-step explanation:

let breadth is =x m

length is x/3 m

we know, perimeter =2 (length +breadth)

or, 120= 2(x+x/3)

or, 60 = 3x+x/3

or, 180= 4x

or,x = 45 m

length of the field is 45/3 = 15 m.

Answer 2

Answer:

Length of field is 15 m.

Step-by-step explanation:

Given:

Perimeter of rectangle = 120 m.

It is given that length of rectangular field is one third of its breadth.

Let breadth be x m.

Then, length = 1/3 of x

                     = (x / 3) m.

As we know that,

Perimeter of rectangle = 2 ( length + breadth)

                      120           = 2 {(x /3) +x}

                       120 / 2     = ( x + 3x ) /3

                       60 × 3   = 4x

                        180 / 4 = x

                         45  = x

Length of field = (x / 3 ) =45 / 3

                         = 15 m.