Question

The length of a rectangle is thrice its breadth and its perimeter is 56 m. The length is??

Answer 1

Answer:

Step-by-step explanation:

Let the length of the rectangle be x  

Breadth  = x/3

Perimeter = 56 m  

2(l+b) = 56 m  

l+b = 28 m  

x+x/3   = 28 m  

4x = 80 m  

x = 21 m  

length = 21 m Breadth = 7 m

Answer 2

Answer:

As we know that rectangle has 4 sides.

Let side be x.

Therefore,

side+side+side+side=perimeter

(sum of all sides= perimeter)

Now, we are going to put the value as they are given.

x+x+x+x=56 cm

(As we know that in rectangle there are total 4 sides where 2 sides of length and 2 sides of width)

x+x+3x+3x=56 cm

8x=56 cm

Now, let's divide both sides by 8.

Hence, the value of x is 7.

X=7 now let's prove X is 8

7+7+3(7)+3(7)=56 cm

7+7+21+21=56

14+42=56

56=56 : 2 sides are 7 cm and 2 sides are 21 cm.