engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Mensuration Solid Figures
If 3 spherical balls having radius 6 cm, 8 cm and 10 cm respectively are melt together to form a big spherical ball. What is the total surface area of the big spherical ball?
1
548π cm2
2
576π cm2
3
672π cm2
4
786π cm2