The spherical ball of lead 3 cm in diameter is melted and recast into 3 spherical balls. The diameters of two of these are 1 ½ cm and 2 cm respectively. The diameter of third ball is? Choices
A) 2.66 cm
B) 2.5 cm
C) 3 cm
D) 3.5 cm
E) 4 cm
4/3 π * 3 * 3 * 3 = 4/3 π[(3/2)3 + 23 + r3]   r = 1.25   d = 2.5   ANSWER:2.5 cm
<result>B</result>
The spherical ball of lead 3 cm in diameter is melted and recast into 3 spherical balls. The diameters of two of these are 1 ½ cm and 2 cm respectively. The diameter of third ball is?