Advertisements
Advertisements
प्रश्न
A rectangular piece of paper has area = 24 cm² and length = 5 cm. Find its perimeter.
Advertisements
उत्तर
∵ Area of rectangle = length × breadth
⇒ 24 cm2 = 5 cm × breadth
⇒ breadth = `(24 "cm"^2)/("5 cm") = 4.8 "cm"`
and, perimeter = 2 × (l + b)
= 2 × (5 cm + 4.8 cm)
= 2 × 9.8 cm
= 19.6 cm
APPEARS IN
संबंधित प्रश्न
In each of the following cases, ABCD is a square and PQRS is a rectangle. Find, in each case, the area of the shaded portion.
(All measurements are in metre).
(i)
(ii)
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
A school playground is rectangular in shape with length = 120 m and breadth = 90 m. Some school boys run along the boundary of the play-ground and make 15 complete rounds in 45 minutes. How much distance they run during this period.
Find the perimeter of a regular hexagon of side 6.5 cm.
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.
Find the perimeter of a rectangle whose area = 2600 m² and breadth = 50 m.
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?
Length of a rectangle is three times its breadth. Perimeter of the rectangle is 40 cm. Find its length and width.
In the following figure, a rectangle with perimeter 264 cm is divided into five congruent rectangles. Find the perimeter of one of the rectangles.
