Question

Two rain drops reach the earth with their terminal velocities in the ratio 4 : 9. The ratio of their radii is –

• A. 4 : 9
• B. 2 : 3
• C. 3 : 2
• D. 9 : 4

Answer 1

Answer: (B)

2 : 3

Answer 2

v µ r² ; $\frac{r_{1}}{r_{2}} = \sqrt{\frac{v_{1}}{v_{2}}}$