Question

the length of a rectangle is three times its breadth if the perimeter is 84 M find the length of the rectangle​

Answer 1

Answer:

The length of the rectangle is

Step-by-step explanation:

Let the breadth of the rectangle be ‘x’

let the length of the rectangle be ‘3 x’

Here, the perimeter of the rectangle is 84 m

The formula for the perimeter of a rectangle is 2(l + b)

Apply the same formula here

2(3x + x) = 84

2(4x) = 84

4x = 84/2

4x = 42

Therefore, x = 42/4

x = 10.5

The breadth of the rectangle = x = 10.5 m

Therefore, the length of the rectangle = 3x = 3 × 10.5 = 31.5 m

I hope this answer will help you

Thank you!

Answer 2

Step-by-step explanation:

let the breadth be x m.

then,the length=3x m.

given perimeter=84M

perimeter of rectangle=2(l+b)

84=2(3x+x)

84=2×4x

84=8x

84/8=x

Hence, the length=3x

3×84/8=252/8=63/2.

length=63/2