Question

the length of a rectangle is twice 5he breadth if the perimeter of the rectangle is 120m . find the breadth​

Answer 1

Given :

• The length of Rectangle is twice the breadth.
• Perimeter of Rectangle = 120 m

To find :

• Breadth of rectangle?

Solution :

Let breadth of rectangle be x m

Then, Length of rectangle is 2x m

According to the Question:

• Perimeter of Rectangle = 120 m

We know that,

Perimeter of Rectangle = 2(l + b)

→ 2(x + 2x) = 120

→ x + 2x = 120/2

→ 3x = 60

→ x = 60/3

→ x = 20

Therefore,

• Breadth of Rectangle, x = 20 m
• Length of Rectangle, 2x = 20 × 2 = 40 m

Hence, Length and Breadth of rectangle is 40 m and 20 m respectively.

Answer 2

Answer:

$\underline{ \sf{ \underline{ ☃ Given:}}}$

• Length of rectangle is twice of breadth
• Perimeter of rectangle is 120m

$\underline{ \sf{ \underline{☃Find:}}}$

• Breadth of rectangle

$\underline{ \sf{ \underline{☃Solution:}}}$

${ \sf{Length \: of \: rectangle \: is \: twice \: of \: breadth}}$

${ \sf{Let \: take \: breadth \: as \: x}}$

${ \sf{So, Length = 2x }}$

We know that ⤵

${ \boxed{ \sf{Perimeter = 2(l+b) }}}$

${ \to{ \sf{120 = 2(2x+x) }}}$

${ \to{ \sf{120 = 2(3x)}}}$

${ \to{ \sf{120 = 6x}}}$

${ \to{ \sf{x = \frac{120}{6} }}}$

${ \to{ \sf{x = 20}}}$

Therefore,

Length of rectangle = 2x = 2×20 = 40cm

Breadth of rectangle = x = 20cm