Question

A big drop of radius $R$ is formed by $1000$ small droplets of water, then the radius of small drop is

• A. $R/2$
• B. $R/5$
• C. $R/6$
• D. $R/10$

Answer 1

Answer: (D)

$\frac{4}{3}\pi R^3=1000\times \frac{4}{3}\pi r^3$
(As volume remains constant)
$R^3=1000r^3\Rightarrow R=10r\Rightarrow r=\frac{R}{10}$