Question

The length of a rectangle is 5cm more than its breadth . if the perimeter of the rectangle is 40 cm , find the dimensions f the rectangle ​

Answer 1

Step-by-step explanation:

find

length and the breath

given

solution

length = x +5

perimeter 2 L+ B

2 x + x = 40

2 x + 5 = 40 / 2

2x + 5 = 20

2 x = 20 -5

2 x + 15

x = 15 /2

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Answer 2

Answer :-

• 7.5 cm

Solution :-

• Let the breadth of the rectangle be x cm

• length of the rectangle = ( x + 5 ) cm
• perimeter of the rectangle= 2( l + b )

• 2 ( x + x + 5 ) cm
• 2 ( 2x + 5 ) cm
• ( 4x + 10 ) cm

Transpose 10 to RHS

• therefore ,
• 4x + 10 = 40
• 4 x = 40 - 10
• x = 30 / 4 = 67.5

• Length of the rectangle = x + 5 = 7.5 + 5 = 12.5
• Breadth of the rectangle = x = 7.5 cm

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