1.

The ratio of the length to the breadth of a rectangle is 7 : 3. Calculate the dimensions of the rectangle if: 12.1 the perimeter is 10 cm.

Answer»

ANSWER:

Length is 3.5 cm and Breadth is 1.5 cm.

Step-by-step explanation:

Given :

RATIO of Length to breadth - 7 : 3

Perimeter - 10 cm

To find :

The dimensions

Solution :

Let the -

  • Let the - Length be 7y
  • Let the - Length be 7y Breadth be 3y

★ 2(Length + Breadth)

⇒ 2(7y + 3y) = 10

⇒ 14y + 6y = 10

⇒ 20y = 10

⇒ y = 10/20

⇒ y = 0.5

\rule{300}{1.5}

★ Length -

⇒ 7(0.5)

⇒ 3.5 cm

Length = 3.5 cm

\rule{300}{1.5}

★ Breadth -

⇒ 3(0.5)

⇒ 1.5 cm

Breadth = 1.5 cm

THEREFORE, the Length is 3.5 cm and Breadth is 1.5 cm.



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