A metallic sphere of diameter 40 cm is melted into smaller spheres of radius 0.5 cm. How many such small balls can be made?
Answer & explanation
Correct answer: option 3
We have a direct concept =
Number of smaller sphere = (\(\frac{ radius \; of \; bigger \; sphere }{ radius \; of \; smaller \; sphere }\))3
= (\(\frac{20}{0.5}\))3 = 403 = 64,000