On a square handkerchief, nine circular designs each of radius 7 cm are made (see Fig. 12.29). Find the area of the remaining portion of the handkerchief.

Radius of circle is 7 cm.
Diameter of the circle is 14 cm.
As 3 circles are there on one side of the square.
The side of the square will be 14 × 3 = 42 cm

Area of square = (Side)2

= (42)2

= 1764 cm2

Area of each circle = πr2

= × (7)2

= 154 cm2

Area of 9 circles = 9 × 154

= 1386 cm2

Area of the remaining portion of the handkerchief = 1764 - 1386

= 378 cm2

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Area Related with Circles47 mins
Quiz | Imp. Qs. on Circles37 mins
Quiz | Testing Your Knowledge on Circles32 mins
Short Cut Trick to Find Area of Triangle43 mins
Champ Quiz | Area Related with the Circle45 mins
Tricks to MemoriseFREE Class
Various Tricks for How to Study Effectively32 mins
Smart and Effective study is the Key of success45 mins
How To Give Dynamic Input to JAVA program?63 mins
Ways to Study Smart30 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :