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
The length of a rectangle is 16 cm and its perimeter is equal to the perimeter of a square with side 12.5 cm. Find the area of the rectangle.
Each side of a square plot of land is 55 m. Find the cost of fencing the plot at the rate of ₹32 per meter.
Find the perimeter of a regular hexagon of side 6.5 cm.
If A denotes area of a rectangle, l represents its length and b represents its breadth, find:
l, if A = 48 cm² and b = 6 cm
The side of a square is 3.6 cm; find its perimeter.
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.
Find the cost of fencing a rectangular park of length 250 m and breadth 175 m at the rate of Rs. 12 per metre.
Length of a rectangle is three times its breadth. Perimeter of the rectangle is 40 cm. Find its length and width.
What is the perimeter of the following figures? What do you infer from the answers?
 (a) |
 (c) |
 (b) |
 (d) |
An increase in perimeter of a figure always increases the area of the figure.
