The volume of first sphere = 27 x volume of second sphere

Let the radius of the first sphere = r_{1 }and, radius of second sphere = r_{2}

(i) Then, according to the question we have

(ii) Surface area of the first sphere = 4 πr_{1}^{2}

And the surface area of second sphere = 4 πr_{2}^{2}

Ratio of their surface areas

Hence, the ratio = 9: 1