The ratio of the volume of two spheres is 8 : 27. What is the ratio of their surface areas?

आयतन अनुपात V1/V2 = (r1/r2)³ = 8/27। त्रिज्या अनुपात r1/r2 = 2/3। पृष्ठीय क्षेत्रफल अनुपात A1/A2 = (r1/r2)² = (2/3)² = 4/9।