Dear student,
Since the area of one quadrant is 346.5 cm2, the area of the whole circle = 346.5 * 4= 1386 cm2
Area of circle= 22/7 * r*r= 1386
r2= 1386*7/22= 441m2
r= root of 441= 21m
Curved perimeter of the quadrant= 2*22/7*21/4= 33m
total perimeter of quadrant= 33 + 21+ 21= 75m
Regards
