engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Quantitative Aptitude

Nine solid metallic spheres of radius 2.5 cm each are melted and recast into a solid cylinder of height 7.5 cm. The curved surface area (in cm2) of the cylinder is:

1
125 π
2
150 π
3
120 π
4
75 π
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