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Udgam School For Children: Unit-12 Perimeter, Area and Volume

This document is a math notebook entry from a 5th grade student. It covers the concepts of perimeter, area, and volume. It defines area as the amount of space occupied by a figure and provides the formulas for finding the area of a rectangle and square. Examples are given for calculating the area of different shapes. The document also works through exercises finding the area of various rectangles and squares given their dimensions. It solves problems such as finding the area of a square given its perimeter and the cost of spraying pesticide on a field of a given area.

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158 views2 pages

Udgam School For Children: Unit-12 Perimeter, Area and Volume

This document is a math notebook entry from a 5th grade student. It covers the concepts of perimeter, area, and volume. It defines area as the amount of space occupied by a figure and provides the formulas for finding the area of a rectangle and square. Examples are given for calculating the area of different shapes. The document also works through exercises finding the area of various rectangles and squares given their dimensions. It solves problems such as finding the area of a square given its perimeter and the cost of spraying pesticide on a field of a given area.

Uploaded by

Anonymous 824Q0SG6iD
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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UDGAM SCHOOL FOR CHILDREN

2021-2022
Class: V Subject: Math NOTEBOOK WORK Date: 12.01.2022

UNIT- 12 PERIMETER, AREA AND VOLUME


EXERCISE: 12.2 (Pg 106)
The amount of space occupied by a figure is called its AREA.
AREA OF A RECTANGLE = LENGTH X BREADTH

LENGTH OF THE RECTANGLE = AREA OF RECTANGLE ÷ BREADTH


BREADTH OF THE RECTANGLE = AREA OF RECTANGLE ÷ LENGTH
AREA OF A SQUARE = SIDE X SIDE

The unit of area is square centimetre (sq. cm)


OR
square metre (sq m)

1. Find the AREA of the rectangles whose lengths and breadths are given
below:
b) Length = 80 cm Breadth = 60 cm c) Length = 24 m Breadth = 15 m

Area of the field = Length x Breadth Do yourself


= 80 cm x 60 cm
= 4,800 sq cm

Ans: AREA of the Rectangle = 4,800 sq cm.

3. Find AREA of the square if each of its side measures

b) Side = 80 cm c) Side 42 m
Do yourself
Area of a square = Side x Side
= 80 cm x 80 cm
= 6,400 sq cm

Ans: Area of the Square = 6,400 sq cm.

Ques 4. / 5. / 6. / 7. ====== PLEASE DO IN TEXTBOOK ONLY =====

Class:5 /Subject – Math/ NOTEBOOK WORK Page 1


hetal.shah@udgamschool.com
SOLVE THE FOLLOWING :

3. The perimeter of a square is 48 m. Find the area of this square.


Solution:
Perimeter of a square = 48 m As the side of the square = 12 m
Side of the square = P ÷ 4 Area of the Square = Side x Side
= 48 m ÷ 4 = 12 m x 12 m
= 12 m = 144 sq m
Side of the square = 12 m

Answer: Area of the square = 144 sq m

4. A field is 10 m long and 10 m broad.


Find the cost of spraying pesticide at the rate of ₹ 7.50 per sq m.

Solution:
Length of a field = 10 m Now Area of the field = 100 sq m
Breadth of the field = 10 m
Cost of spraying pesticide for 1 sq m = ₹ 7.50
Area of the field = Length x Breadth Therefore cost for spraying 100 sq m = ?
= 10 m x 10 m = ₹ 7.50 x 100 sq m
= 100 sq m = ₹ 750
Area of the field = 100 sq m

Answer: Cost of spraying pesticide = ₹ 750

7. Find the length of a rectangular field having an area of 964.20 sq m and breadth
34.60 m.
Solution:
Area of the rectangular field = 964.20 sq m
Breadth of the field = 34.60 m

Length of the field = Area of the field ÷ Breadth


= 964.20 sq m ÷ 34.60 m
= 27.87 m

Answer: Length of the field = 27.87 m

PLEASE NOTE : THE UNDONE QUESTIONS OF THIS EXERCISE SHOULD BE DONE AS


PRACTICE WORK BY YOURSELF

Check your answers with the following answer key.


1 (c) 360 sq. m 3 (c) 1764 sq. m

Class:5 /Subject – Math/ NOTEBOOK WORK Page-2


hetal.shah@udgamschool.com

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