Advertisements
Advertisements
Question
Each rectangle is made out of 12 equal squares, so all have the same area, but the length of the boundary will be different.
Which of these rectangles has the longest perimeter?
Advertisements
Solution
- Perimeter of rectangle measuring 1 × 12 cm
= 2 (length + breadth)
= 2 (1 + 12)
= 2 x 13
= 26 cm - Perimeter of rectangle measuring 2 × 6 cm
= 2 (length + breadth)
= 2 (2 + 6)
= 2 × 8
= 16 cm - Perimeter of rectangle measuring 3 × 4 cm
= 2 (length + breadth)
= 2 (3 + 4)
= 2 × 7
= 14 cm
Hence, the rectangle measuring 1 × 12 cm has the longest perimeter.
APPEARS IN
RELATED QUESTIONS
The perimeter of a rectangle is 46 m and its length is 15 m. Find its :
(i) breadth
(ii) area
(iii) diagonal.
A rectangular piece of paper has area = 24 cm² and length = 5 cm. Find its perimeter.
A farmer has a rectangular field of length and breadth 240 m and 180 m respectively. He wants to fence it with 3 rounds of rope as shown in the figure. What is the total length of rope he must use?
If the length of a rectangle is 20 m and its width is 12 m, what is its perimeter?
The table given below contains some measures of the rectangle. Find the unknown values.
| Length | Breadth | Perimeter | Area |
| 5 cm | 8 cm | ? | ? |
If every side of a rectangle is doubled, then its area becomes _______ times
Find the perimeter of a rectangle, whose sides are 12 cm and 8 cm
A rectangular path of 60 m length and 3 m width is covered by square tiles of side 25 cm. How many tiles will there be in one row along its width? How many such rows will be there? Find the number of tiles used to make this path?
Rectangle MNOP is made up of four congruent rectangles (see figure). If the area of one of the rectangles is 8 m2 and breadth is 2 m, then find the perimeter of MNOP.
In the following figure, a rectangle with perimeter 264 cm is divided into five congruent rectangles. Find the perimeter of one of the rectangles.
