Question

The length of a rectangle is 5cm more than its breadth. If the perimeter of a rectangle is 40c,find the length and breadth ​

Answer 1

Answer:

Perimeter of a rectangle = 2 ( l+ b )

= 2 ( 5 +40)

= 2× 45

= 90 is the answer

Answer 2

Given :-

• The length of rectangle is 5cm more than its breadth
• the perimeter of rectangle = 40 cm²

To Find :-

• length of rectangle
• breadth of rectangle

Required Answer :-

:⟹ Here we assume the breadth of rectangle is X = B

:⟹ And length of rectangle is X + 5 = L

Now ,

:⟹ perimeter of rectangle = 2 ( L + B )

:⟹ 40 cm² = 2 [ ( X + 5 ) + ( X ) ]

:⟹ 40cm² = X + 5 + X

2

:⟹ 20 cm² = 2X + 5

:⟹ 20 – 5 = 2x

:⟹ 15 = 2x

:⟹ 15 / 2 = x

:⟹ 7.5 = x

:⟹ length = X + 5 = 7.5 + 5 = 12.5 cm

:⟹ breadth = X = 7.5 cm

I hope it helps you