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
Find the length and perimeter of a rectangle, whose area = 120 cm2 and breadth = 8 cm
The diagonal of a rectangle is 34 cm. If its breadth is 16 cm; find its :
(i) length
(ii) area
Find the perimeter of a rectangle whose:
length = 10 m and breadth = 8 m
Mohit makes 8 full rounds of a rectangular field with length = 120 m and breadth = 75 m.
John makes 10 full rounds of a square field with each side 100 in. Find who covers larger distance and by how much?
A rectangle with length = 18 cm and breadth = 12 cm has same perimeter as that of a regular pentagon. Find the side of the pentagon.
The perimeter of a rectangular field is 500 m and its length = 150 m. Find:
(i) its breadth,
(ii) its area.
(iii) cost of ploughing the field at the rate of ₹1.20 per square meter.
A game requires its players to run around a square playground. Each side of the playground is 20 m long. One player took 5 rounds around the playground. How many metres did he run altogether?
A rectangular piece of land measures 0.7 km by 0.5 km. Each side is to be fenced with 4 rows of wires. What is the length of the wire needed?
An increase in perimeter of a figure always increases the area of the figure.
Why is the perimeter of a rectangle calculated as 2 × (length + breadth)?
