Question

find the length and breadth of rectangle who's perimeter is 72cm and dimensions are 5x+4 and x-4​

Answer 1

$\bf\underline{\underline{\green{SOLUTION:-}}}$

Question

• Find the length and breadth of rectangle who's perimeter is 72cm and dimensions are 5x+4 and x-4?

Answer

• Length = 34cm
• Breadth = 2cm

Given

• Perimeter = 72cm
• Dimensions are 5x+4 and x-4

To Calculate

• Length and breadth __?

Explanation

Let

Length (l) = 5x+4

Breadth (b) = x-4

Perimeter = 72cm

☆ Perimeter of rectangle = 2(l+b)

➩ 2(5x+4+x-4) = 72

➩ 2( 6x)= 72

➩ 6x= 72/2

➩ 6x = 36

➩ x= 36/6

➩ x= 6

Length = 5x+4

➩ 5×6+4

➩ 30+4

➩ 34

Breadth = x-4

➩ 6-4

➩ 2

$\bf\underline{\underline{\green{HENCE:-}}}$

• Length = 34cm
• Breadth = 2cm

⠀⠀⠀⠀_______________________________________

Answer 2

Answer:

Dimensions of the rectangle ,

Length = l = 5x + 4

Breadth = b = x - 4

According to the problem given ,

Perimeter = 72 m

2( l + b ) = 72

l + b = 72 /2

l + b = 36

5x + 4 + x - 4 = 36

6x = 36

x = 36 / 6

x = 6

l = 5x + 4 = ( 5 × 6 ) + 4 = 30 + 4  

l = 34 m

b = x - 4  

b = 6 - 4

b = 4 m

Therefore ,

l = 34m , b = 4m

Step-by-step explanation: