• # question_answer Find the number of lead balls of radius 1 cm each that can be made from a sphere of radius 4 cm. A)  24                               B)  85             C)  64     D)  46

(c): no. of lead balls $\frac{V}{v}=\frac{\frac{4}{3}\pi {{R}^{3}}}{\frac{4}{3}\pi {{r}^{3}}}$ $={{\left( \frac{R}{r} \right)}^{2}}={{\left( \frac{4}{1} \right)}^{3}}=64$