Question

if the perimeter of a rectangle is 72 cm and it's breadth is 15 cm, then find its length​

Answer 1

Question :

if the perimeter of a rectangle is 72 cm and it's breadth is 15 cm, then find its length ?

Answer :

$\sf\pink{Given:}$

• Perimeter of the rectangle is 72 cm .

• Breadth of the rectangle is 15 cm .

$\sf\pink{To\:find:}$

• Length of the Rectangle ?

Explanation :

Perimeter of rectangle = 2( l + b)

$\longrightarrow\bf{ 72 = 2\times ( l + 15 )}$

$\longrightarrow\bf{ 72 = 2l + 30}$

$\longrightarrow\bf{ 72 - 30 = 2l }$

$\longrightarrow\bf{ 42 = 2l }$

$\longrightarrow\bf{ l = \dfrac{42}{2} }$

$\longrightarrow\bf{ l = 21 }$

• Therefore length of the rectangle is 21 cm .