Question

The length of a rectangle is 4 cm more than it's breadth. If the perimeter is84cm.
a)length+breadth=? b)find the length and breadth of the rectangle?

Answer 1

Answer:

l=33.2cm b=8.4 cm

Step-by-step explanation:

b=x

l=4x

p of rect=2 (l+b)

=2 (x + 4x)

=2 (5x)

=10x

p of rect =84cm

10x=84cm

x=84÷10

x=8.4cm

Answer 2

The Length of the Rectangle is 23 cm  

The Breadth of the Rectangle is 19 cm

Length + Breadth = 42 cm

Step-by-step explanation:

GIVEN VALUES:

1. The length of a rectangle is 4 cm more than it's breadth.

2. The perimeter is 84cm

TO FIND:

1.  Find the length and breadth of the rectangle

2. Length+breadth=?

FORMULA:

1. Perimeter of a Rectangle is P = 2(l+b)

We know that,

P= 84

From the given values,

The length of a rectangle is 4 cm more than it's breadth.

let, Breadth = x

    Length = x+4

Apply the given values in the formula

P= 2(l+b)

84 = 2((x+4)+x)

84 = 2(x+4+x)

84 = 2(2x+4)

84 = 4x+8

84-8  = 4x

4x = 84-8

4x = 76

x = 76 ÷ 4

x =  19

X is the Breadth value

Breadth = 19cm

Length = x+4

Length = 19+4

Length = 23 cm

To Find:

1. Find the length and breadth of the rectangle

  Length = 23 cm

  Breadth = 19 cm

2. Length+breadth=?

  Length + Breadth = 23+19

  Length + Breadth = 42 cm