Question

The perimeter of a rectangle is 70cm lf its breadth is 5cm less than the length find its area

Answer 1

Answer:

Step-by-step explanation:

Peri = 70 cm

Let the length be x cm

Breadth = x-5 cm

Peri = 2(l+b)

2(x + x-5) = 70

2x -5 = 70/2

2x = 35+5

x = 40/2

x = 20 cm

Length = 20cm

Breadth = 15 cm

Answer 2

Let length be X.
Breadth=5-x cm
Given, Perimeter=70cm.

Perimeter = 2(l+b)
=> 70 =2{x+(x-5)}
=> 70=2(x+x-5)
=> 70= 2(2x+5)
=> 70= 5x+10
=>70-10=5x
=>60=5x
=>60÷5=x
=>x=12cm
Length is 12cm
Bredth is (12-5=7) 7cm

Area=l×b
= 12×7
=84cm square.

Hope it helps!