Question

LEaD spheres of diameter 6 cm each are dropped into a cylindrical beaker containing some water and are fully submerged if the diameter of the beaker is 18 cm and water level Rises by 40 cm find the number of spheRES
has dropped in the water

Answer 1

number of lead balls = pie×81×40/4/3×pie×9×3
= 9×10=90