A solid whose volume does not change with temperature, floats in a liquid. Fractions `f_(1)andf_(2)` of its volume remain submerged for two different temperatures `t_(1)andt_(2)` of liquid. The volume coefficient of expansion of liquid is

Options

A. `(f_(1)+f_(2))/(f_(1)t_(1)+f_(2)t_(2))`
B. `(f_(1)+f_(2))/(f_(2)t_(1)+f_(1)t_(2))`
C. `(f_(1)-f_(2))/(f_(1)t_(1)+f_(2)t_(2))`
D. `(f_(1)-f_(2))/(f_(2)t_(1)-f_(1)t_(2))`

Answer

D