Question

A big drop of radius R is formed by 1000 small droplets of water. The radius of small drop is(a) $\frac{R}{10}$(b) $\frac{R}{100}$(c) $\frac{R}{500}$(d) $\frac{R}{1000}$

Answer 1

4/3 pi R^3 = 1000x4/3 pi r^3

=R^3= 1000xr^3

=R=10r

so, r =R/10

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