Advertisements
Advertisements
Question
A rectangular piece of paper has area = 24 cm² and length = 5 cm. Find its perimeter.
Advertisements
Solution
∵ 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
RELATED QUESTIONS
The length and the breadth of a rectangular field are in the ratio 5: 4 and its area is 3380 m2. Find the cost of fencing it at the rate of ₹75 per m.
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.
Find the perimeter of a rectangle whose:
length = 40 cm and breadth = 35 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.
If A denotes area of a rectangle, l represents its length and b represents its breadth, find:
b, if A = 88 m² and l = 8m
The perimeter of a square field is numerically equal to its area. Find each side of the square.
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 length of a rectangular plot of land is 50 m and its width is 30 m. A triple fence has to be put along its edges. If the wire costs 60 rupees per metre, what will be the total cost of the wire needed for the fence?
How many different rectangles can be made with a 48 cm long string? Find the possible pairs of length and breadth of the rectangles.
Find the perimeter of a rectangle, whose sides are 12 cm and 8 cm
