Question

The length of a rectangle is 5 more than the breadth. The perimeter of the rectangle is 30cm, its breadth is _______cm.​

Answer 1

Answer:

20 cm

Step-by-step explanation:

The length of a rectangle is 5cm more than its breadth.If the perimeter of the rectangle is 70cm.Find its length and breadth.

Answer

Let the breadth of the rectangle be xcm

Then it's length=x+5cm

Perimeter=2(length+breadth)

⇒70=2(x+(x+5))

⇒

2

70

=2x+5

⇒2x+5=35

⇒2x=35−5=30

⇒x=

2

30

=15cm

Breadth=x=15cm and length=x+5=15+5=20cm

Answer 2

Answer:

let breadth be b cm.

l= b+5

perimeter of rectangle =

30cm = 2(l+b)

= 2(b + 5 + b) = 30

= 2b + 5 = 15

= 2b = 15-5 = 10

= b = 5 cm.