A solid metal sphere of radius 6 cm is completely immersed in a vertical cylindrical vessel containing water, causing the water level to rise by 4 cm. What is the radius of the cylinder?

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (C) 6√2 cm

ব্যাখ্যা

(4/3)π6³ = πr² × 4 gives r² = 72, r = 6√2 cm.