A metallic sphere of radius 4 cm is melted and the cast into small spherical balls, each of diameter 0.4 cm. The number of small balls will be:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 8000
Volume of Sphere = (4/3) × π × r3
(4/3) × π × 43 = n((4/3) × π × 0.23)
64 = n(0.008)
n = 8000