Question

the breadth of a rectangle is one _ third of its length. if its perimeter is 80 metres find its length​

Answer 1

Answer:

Step-by-step explanation:

Breadth =1/3​ × Length

⇒ Length =3 × Breadth

Given, 2(Length + Breadth)=240 m

⇒ 2(3 × Breadth + Breadth)=240 m

⇒ 8 × Breadth =240⇒ Breadth =30 m

⇒ Length =3 × Breadth =90 metres.

Answer 2

Answer:

Length = 30m and Breadth = 10m

Step-by-step explanation:

Given that :

Perimeter = 80 m ;

Breadth = 1/3 of Length ; Length = l

We know that :

Perimeter of rectangle = 2 ( L + B ).

80 = 2 ( L + 1/3 L )

80/2 = 4/3 L.

40 = 4/3 L

3/4 × 40 = L.

3 × 10 = L.

L = 30m.

Breadth = 1/3 of Length.

Breadth = 1/3 × 30.

Breadth = 10m.

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