Given, Total surface area of a hemisphere (TSA) = 7392cm2
By formula,
Total surface area of a hemisphere (TSA) = 2
or,7392cm2 = \(3\times\frac{22}7\times r^2\)
or, \(\frac{7\times7392cm^2}{66}=r^2\)
or, r2 = 784cm2
or, r2 = (28cm)2
or, r = 28cm
Therefore the radius of the hemisphere (R) = 28cm.