What is the radius of a gold ring which has its circumference same as perimeter of a silver wire bent in the shape of a semicircle of diameter 70 cm?

This is the right answer as:- Diameter of semicircular silver wire = 70 cm Radius of semicircular silver wire = 70/2 = 35 cm Circumference of the gold ring = circumference of the semicircular silver wire (given in the question) 2 * pi * radius of gold ring = pi * radius of the silver wireradius of gold ring = (pi * radius of the silver wire)/(2 * pi) radius of gold ring                                    = 35 cm/2                                    = 17.5 cm

Ans. 17.5 cm