0Perimeter sums
Square:
1) A square farm filled with cows has a side of 20 metres. What is the perimeter of the farm?
Given: Side of a square farm (s) = 20 metres
To find: Perimeter of the farm
Solution: Perimeter of a Square = 4 × side
= 4 × 20
= 80 metres
Ans: Perimeter of the square farm is 80 metres.
2) Side of a book is 15 cm, the book is square in shape. Find the perimeter of the book.
Given: Side of a book (s) = 15 cm
To find: Perimeter of the book
Solution: Perimeter of a Square = 4 × side
= 4 × 15
= 60 cm
Ans: Perimeter of the book is 60 cm.
Triangle:
1) Sides of a triangular sector is 4 metres, 6 metres and 3 metres. Find the perimeter of the sector.
Given: Sides of a triangular sector = 4, 6, 3 metres
To find: Perimeter of the sector
Solution: Perimeter of the triangle = sum of all sides
= 4 + 6 + 3
= 13 metres
Ans: Perimeter of the sector is 13 metres.
2) Three sides of a triangle are 5 cm each. Find it's perimeter.
Given: Each side of a triangle = 5 cm
To find: Perimeter of triangle
Solution: Perimeter of triangle = sum of all sides
= 5 + 5 + 5
= 15 cm
Ans: Perimeter of the triangle is 15 cm.
Rectangle:
1) Length of a rectangular plot is 25 metres and it's breadth is 15 metres. What is the perimeter?
Given: Length of a plot (l) = 25 metres
Breadth of a plot (b) = 15 metres
To find: Perimeter of the plot
Solution: Perimeter of a rectangle = 2 (l + b)
= 2 (25 + 15)
= 2 (40) i.e 2 × 40
= 80 metres
Ans: Perimeter of the plot is 80 metres.
2) The sides of a rectangular field are 150 metres and 120 metres. Find the perimeter of the rectangular field.
Given: Length of the field (l) = 150 metres
Breadth of the field (b) = 120 metres
To find: Perimeter of the field
Solution: Perimeter of the field = 2 (l + b)
= 2 (150 + 120)
= 2 (270)
= 540 metres
Ans: Perimeter of the field is 540 metres.
