A solid sphere of radius 7 cm is melted and recast into smaller spheres of radius 1 cm. How many such small spheres will be formed?
Show answer & explanation
Correct answer: C
Explanation
Radius of the large sphere = 7 cm
Radius of the small sphere = 1 cm
Number of small spheres = (7 × 7 × 7) ÷ (1 × 1 × 1) = 343