Advertisements
Advertisements
प्रश्न
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
उत्तर
- 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
संबंधित प्रश्न
A path of uniform width, 2.5 m, runs around the inside of a rectangular field 30 m by 27 m. Find the area of the path.
The length and the breadth of a conference hall are in the ratio 7: 4 and its perimeter is 110 m. Find:
(i) area of the floor of the hall.
(ii) a number of tiles, each a rectangle of size 25 cm x 20 cm, required for the flooring of the hall.
(iii) the cost of the tiles at the rate of ₹ 1,400 per hundred tiles.
Find the perimeter of a rectangle whose:
length = 3.6 m and breadth = 2.4 m
Find the perimeter of a regular pentagon of side 8.2 cm.
A regular pentagon of each side 12 cm has same perimeter as that of a regular hexagon. Find the length of each side of the hexagon.
The perimeter of a square is 60 m, find:
(i) its each side its area
(ii) its new area obtained on increasing
(iii) each of its sides by 2 m.
Each rectangular tile is 40 cm long and 30 cm wide. How many tiles will be required to cover the floor of a room with length = 4.8 m and breadth = 2.4 m.
The cost of flooring a hall of ₹64 per square meter is ₹2,048. If the breadth of the hall is 5m, find:
(i) its length.
(ii) its perimeter.
(iii) cost of fixing a border of very small width along its boundary at the rate of ₹60 per square meter.
The table given below contains some measures of the rectangle. Find the unknown values.
| Length | Breadth | Perimeter | Area |
| 5 cm | 8 cm | ? | ? |
On a centimetre squared paper, make as many rectangles as you can, such that the area of the rectangle is 16 sq cm (consider only natural number lengths).
- Which rectangle has the greatest perimeter?
- Which rectangle has the least perimeter?
- If you take a rectangle of an area of 24 sq cm, what will be your answers?
