NTSE
5th Foundation NTSE
Self Learning
Free Topics
(Click here to know About SELF LEARNING)
Concepts Learning Progress
Available
Course Progess
Self Learning Progress
Report Card
Revision / Exam Preparation
Theory Notes
Question Bank
Subjects Related Concepts
Test Generator
Free Topics
Reports
Available as Required.
VIDEOS
Few Available
NTSE
5th Foundation NTSE
Self Learning
Available
(Click here to know About SELF LEARNING)
Concepts Learning Progress
Available
Test Generator
Syllabus / Topic Test
Solution and Detailed Analysis
Course Progess
Self Learning Progress
Report Card
Revision / Exam Preparation
Theory Notes
Test Generator
Subjects Related Concepts
Self Learning
Videos
Self Learning Exams
Practice
Self Learning - At Own Pace
Question Answers with Explaination
Reports
Question-wise Analysis
Strong, Moderate and weak Concepts
Remedial Tests for Weak Concepts
Achievements - Month/Subject & Subject / Month
Self Study Detail
Graphical View
Your Rankings - Month / Subject & Subject / Month
VIDEOS
13
SUBJECTS
Maths, Physics, Chemistry, Biology, English, History, Democratic Politics, Geography, Verbal Reasoning, Non Verbal Reasoning
A figure (or shape) that can be divided into more than one of the basic figures is said to be a composite figure (or shape). The area of a composite figure is calculated by dividing the composite figure into basic figures and then using the relevant area formula for each basic figure.
Illustration: Find the area of the following composite figure:
Solution: The figure can be divided into a rectangle and triangle as shown:
So, the area of the composite figure is
Illustration: Find the area of the shaded region.
Solution:
Given: Side of the outer square = 10 cm
Area of outer square = Side X Side
= 10 X 10
= 100 sq cm
Given: Side of the square which lies in the interior of above diagram = 1 cm
Area of the square which lies in the interior of the above diagram = Side X Side
= 1 X 1
= 4 sq cm
As 4 squares lie in the interior region, Hence the sum of the area of all the 4 squares = 4 + 4 + 4 + 4
= 16 sq cm
Now, area of shaded region = Area of the outer square - Area of 4 interior squares
= 100 - 4
= 96 sq cm
Illustration: A floor is 5 m long and 4 m wide. A square carpet of sides 3 m is laid on the floor. Find the area of the floor that is not carpeted.
Solution: Area of the rectangular floor = length X breadth
= 5 X 4
=
and the area of square carpet = side X side
= 3 X 3
=
The area of the floor that is not carpeted = Area of the rectangular floor - area of square carpet
= (20 - 9) sq m
=