with 66 cm long steps. In 400 steps, he makes a full rouildIfa wire is

1.	with 66 cm long steps. In 400 steps, he makes a full rouildIfa wire is bent into the sha12.2. lfa wire is bent into the shape of a square, the area of the square is 49 cm2. When the wire is bent into a semia)IfatCircular shape, find the circumference ofthe semicircle.〔Take πig urhat is the ratio of their radii?
Answer» Area of square = 49 cma^2 = 49a= 7 cm Side of square = 7 cmPerimeter of square = Perimeter of semi circlePerimeter of semi circle = 4* 7 = 28 cm pi * r + 2r = 28=> r (2+ pi) = 28=> r (2+22/7) = 28=> r (36/7) = 28=> r = 28 * 7/36=> r = 77/9=> r = 49/9 cm Radius of semi circle = 49/9= 5.44 cm circumference = 2πr= 222/7*5.433.9cm

with 66 cm long steps. In 400 steps, he makes a full rouildIfa wire is bent into the sha12.2. lfa wire is bent into the shape of a square, the area of the square is 49 cm2. When the wire is bent into a semia)IfatCircular shape, find the circumference ofthe semicircle.〔Take πig urhat is the ratio of their radii?

Answer»

Area of square = 49 cma^2 = 49a= 7 cm

Side of square = 7 cmPerimeter of square = Perimeter of semi circlePerimeter of semi circle = 4* 7 = 28 cm

pi * r + 2r = 28=> r (2+ pi) = 28=> r (2+22/7) = 28=> r (36/7) = 28=> r = 28 * 7/36=> r = 7*7/9=> r = 49/9 cm

Radius of semi circle = 49/9= 5.44 cm

circumference = 2πr= 2*22/7*5.433.9cm