**The figure below is made up of five identical rectangles. If the toal area of the figure is 540 square cm, find the perimeter of one rectangle. ****Solution**

Area of 1 rectangle ----- 540 square cm divided by 5 = 108 square cm

Length of rectangle is 3 times breadth rectangle, therefore, we can divide 1 rectangle into 3 equal parts as shown above.

The area of 1 square above ----- 108 square cm divided by 3 = 36 square cm

The side of this 1 unit square has to be 6 cm (6 x 6 = 36)

Since 1 side of the square is 6 cm, the length of 1 rectangle is -----

6 cm x 3 = 18 cm

The perimeter of 1 rectangle is therefore,

18 cm + 6 cm + 18 cm + 6 cm = 48 cm

**Answer: The perimeter of one rectangle is 48 cm.**

## 2 comments:

How on earth u all get my school's

exam paper? tis paper is the 1 i almost failed last year...

booklet B is a real hard 1..

How is it so sure that 1 rectangle divide into 3 equal parts will sure get a square?

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