Question

On a square handkerchief, nine circular designs each of radius 7 cm are made. find the area of the remaining portion of the handkerchief.

Answer 1

Square:
a=42cm
Circle:
r=7cm
Area of remaining portion=Area of square-9(Area of circle)
                                           =a^2-9(πr^2)
                                           =42^2-9[(22/7)X7X7]
                                           =1764-9(22X7)
                                           =1764-9X154
                                           =1764-1386
                                           =378 cm^2

Answer 2

Here is ur answer!!

Hope this will help u ;)