Question

the area of rectangle is 40 square cm of it's breadth is four cm then is length is​

Answer 1

Answer:

The length of a rectangle is 4cm more than its breadth, if the perimeter of the rectangle is 40 cm, then what is its length and breadth?

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Let the breadth of rectangle be x cm. Hence the length of rectangle is x + 4 cm.

We know Perimeter of the rectangle

= 2 (length + breadth)

= 2 (x + 4 + x)

= 2 (2x + 4)

= 4x + 8 cm.

Perimeter of rectangle = 4x + 8 cm = 40 cm

4x + 8 = 40

4x = 40 - 8

4x = 32

x = 32/4

x = 8

Thus breadth of rectangle is 8 cm. Therefore

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

Answer the dimensions of rectangle are length 12 cm and breadth 8 cm

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Answer 2

Answer:

10 cm

Step-by-step explanation:

Given : Area = 40 sq cm

          : Breadth = 4 cm

We know that ,

                        Area of rectangle = l*b

                                                       = l*4cm

Length = 40/4

            = 10 cm