engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Mensuration Solid Figures
A solid metallic sphere of radius 4 cm is melted and recast into spheres of the radius of 2 cm each. What is the ratio of the surface area of the original sphere to the sum of surface area of the spheres, so formed?
1
2 ∶ 1
2
2 ∶ 3
3
1 ∶ 2
4
1 ∶ 4