Question

b) The perimeter of a rectangular field is 54 m. 14 its breadth
is 12 m, then its lenght is_______​

Answer 1

Answer:

15m

Step-by-step explanation:

Lenght = x

Breadth = 12m

Perimeter = 54m

Perimeter of a rectangle = 2( Length + Breadth )

Equation = 2( x + 12 ) = 54

= 2x + 24 = 54

= 2x = 54 - 24

= 2x = 30

= x = 30/2

= x = 15m

Answer = Length = x = 15m

Or You can solve it with other method also which is given below. The method which will be easy for you do that one only.

Perimeter = 54m

Breadth = 12m

Length = Perimeter/2 - Breadth

= 54/2 - 12 = 27 - 12 = 15m

Answer = Length = 15m

( Perimeter/2 - Breadth ) is a formula to find the length of a rectangle if perimeter and breadth is given.