<PRE><B>Question 887606</B>
A wire in the form of a square of side 7.5cm is bent into a circle. Find the radius of the circle.  
Solution
perimeter of square = 4xside of square 
                    = 4x7.5 =30 cm
as per given conditions perimeter of square will be equal to circumference of circle 
circumference of circle = 30 cm 
2 pie r=30
r =30/2x pie 
r= 30x7/2x22
r= 210/44 = 105/22 =4.7727 cm
Answer 4.8 cm approx</PRE>