engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Quantitative Aptitude Mensuration Solid Figures
If the ratio of the diameters of two spheres is 4 ∶ 7, then the ratio of their surface areas will be:
1
49 ∶ 16
2
16 ∶ 49
3
7 ∶ 4
4
2 ∶ 7