Correct Answer - Option 1 : 77 cm
GIVEN:
T.S.A of hemisphere = 55902 sq.cm
FORMULA USED:
T.S.A of hemisphere = 3πr2
CALCULATION:
Radius = r cm
A.T.Q
3 × 22/7 × r2 = 55902
r2 = (55902 × 7)/(22 × 3)
r2 = 847 × 7 = 11 × 11 × 7 × 7
r = 11 × 7 = 77 cm
∴ Radius of the hemisphere is 77cm.