Ratio and Proportion Practice Test 1

Question : 18 of 40

Marks: +1, -0

The areas of two spheres are in the ratio 1 : 4. the ratio of their volumes is:

Solution:

{4πr^2}/{4πR^2}=1/4

∴ r^2/R^2=1/4

⇒r/R=1/2

⇒r^3/R^3=1/8

⇒{4/3πr^3}/{4/3πR^3}=1/8

Thus, their volumes are in the ratio 1 : 8.

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