Question

The perimeterof a rectangle field is 64 m. If its lenght is 20m,find: its breadth and its area

Answer 1

Answer:

Breadth is 12m and Area is 240 m² .

Step-by-step explanation:

Perimeter is 64 m and its formula is 2 * ( Length + Breadth )

So, 2 * ( Length + Breadth ) = 64

=> 2 * ( 20 + Breadth ) = 64

=> 20 + Breadth = 32

=> Breadth = 12 m (Ans.)

Area = length * Breadth

        = 20 m * 12 m

        = 240 m² ( Ans.)

Answer 2

Answer:

The breadth and area of  the rectangular field is 12 m and 240 $m^2$ respectively.

Step-by-step explanation:

The perimeter of a rectangle with a length $l$ and breadth $b$ is

$Perimeter = 2(l+b)$

Since the perimeter is 64 m and the length is 20 m, we get the equation as

$64=2(20+b)$

We can solve the above equation to find the breadth of the rectangular field.

$\implies 20+b=\dfrac{64}{2}\\\\\implies 20+b=32\\\\\implies b=32-20=12m$

So the breadth is 12 m and hence the area of the field is,

$Area = l\times b=20\times 12=240\ m^2$