Question

the length of a rectangle is 3 times its width.if the perimeter is 84 m, find the length of rectangle.​

Answer 1

Answer:

31.5m

Step-by-step explanation:

let the ratio constant be x

thus length=3x

and breadth=x

perimeter=sum of all sides

84=3x+3x+x+x

8x=84

x=10.5 m

• thus length=3x=3×10.5=31.5m

Answer 2

ANSWER :-

Let the breadth of the rectangle = x.

Then,

Length of the rectangle = 3x.

Perimeter of the rectangle = 84 m.

2(l+b) = 84

l+b = 42

3x + x = 42

4x = 42

x = 1.05.

Therefore, breadth of the rectangle is 1.05 m.

and length of the rectangle = 3.15 m.