Question

The length of a rectangular field is thrice its breadth. If the perimeter of this field is 800m, what is the length of the field .​

Answer 1

Answer:

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Step-by-step explanation:

Given:

The perimeter of the rectangle = 800m

Length is thrice its breadth

To find:

Length

Solution:

Let us take l,b as length and breadth of the rectangle.

From given,we can write

l = 3b

Perimeter of the rectangle = 2 (l+b)

2 (l+b) = 800

l + b = 400

Substitute the value of l ,

3b + b = 400

4b = 400

b = 100m

Substitute the value of b,

l = 3(100)

l = 300 m

The length of the rectangle is 300m

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Answer 2

Answer:

let breadth be X

so length will be 3x

perimeter=800m

perimeter=2×(l+b)

800=2(X+3x)

800=2×(4x)

800=8x

X=800÷8=100

thus breadth =100 m

and length = 300m

Step-by-step explanation: