Question

length of rectangle is 4cm more than of its breadth .if the perimeter of rectangle is 30cm.find length and breadth of rectangle

Answer 1

Answer:

12 cm

Step-by-step explanation:

Let the breadth of the rectangle be x cm.

Then it's length = x+4 cm

Perimeter of the rectangle= 2(l+b)

= 2(x+4+x) = 2(2x+4) = 4x + 8 cm

But perimeter of the rectangle = 40 cm

So. 4x + 8 = 40 => 4x = 40 - 8 => 4x = 32

=> x = 32/4 => x = 8

So breadth = 8 cm

Length of the rectangle = x+4 = 8+4=12 cm