CUET Preparation Today
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? |
32,000 3,200 64,000 6,400 |
64,000 |
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 |
