We have
Volume of Sphere = 4851 cm3
We know that, the volume of Sphere
= 43πR3
So,
43πR3 = 4851
R3= 3×485×74×22
R= 3√1157.625
R= 10.5 cm.
Now, for volume of the sphere =43123cm3
43πr3=43123
πr3=43124
r3= 1078×722
r= 3√343
r =7
Now, Change in radius
R−r= 10.5−7=3.5 cm
Hence, this is the answer.