Advertisements
Advertisements
प्रश्न
The area of a rectangular shaped photo is 820 sq.cm. and its width is 20 cm. What is its length? Also find its perimeter
Advertisements
उत्तर
Area of a rectangle = (length × breadth) unit2
Here width = 20 cm (breadth)
Area = 820 sq.cm
∴ 820 sq.cm = (length × 20) cm2
Length = `820/20`
= 41 cm
Length of the photo = 41 cm
Perimeter of a rectangle = 2(l + b) units
= 2(41 + 20) cm
= 2 × 61
= 122 cm
Perimeter of the photo = 122 cm
APPEARS IN
संबंधित प्रश्न
Find the perimeter of a rectangle whose length = 22.5 m and breadth = 16 dm.
The diameter of a circle is 42 cm, find its perimeter. If the perimeter of the circle is doubled, what will be the radius of the new circle? (Take π = `22/7`)
The lengths of the sides of two squares are in the ratio 8:15, find the ratio between their perimeters.
Find the perimeter of each of the following closed figures:
Take a thick paper sheet of length 14 cm and width 9 cm. You can also use an old postcard.
- What is its area? What is its perimeter?
Can you make a rectangle with a still longer boundary? I made a rectangle 1 cm wide and 80000 m long. Imagine how long that boundary will be!!! With that much gold wire I can become a king!
Two regular Hexagons of perimeter 30 cm each are joined as shown in the following figure. The perimeter of the new figure is ______.
Four regular hexagons are drawn so as to form the design as shown in the following figure. If the perimeter of the design is 28 cm, find the length of each side of the hexagon.
Length of a rectangular field is 6 times its breadth. If the length of the field is 120 cm, find the breadth and perimeter of the field.
What is the perimeter of a closed figure?
