(4) All the three slaiciii69. The area of a circle with centre 'O' is

1.	(4) All the three slaiciii69. The area of a circle with centre 'O' is 308 cm2. Find the perimeter of theshaded semi-circle from the following figure.(1) 72 cm(3) 108 cm(2) 58 cm(4) 362 cm
Answer» Area of circle=πr^2308=(22/7)r^2147=r^2r^2=98r=7√2cm Perimeter of semi circle=πr+2r=(22/7)7√2+2(7√2)=22√2+14√2=36√2cmoption 4 is correct

(4) All the three slaiciii69. The area of a circle with centre 'O' is 308 cm2. Find the perimeter of theshaded semi-circle from the following figure.(1) 72 cm(3) 108 cm(2) 58 cm(4) 362 cm

Answer»

Area of circle=πr^2308=(22/7)r^214*7=r^2r^2=98r=7√2cm

Perimeter of semi circle=πr+2r=(22/7)*7√2+2(7√2)=22√2+14√2=36√2cmoption 4 is correct