Apiece of steel has a weight $W$ in air, $W_1$ when completely immersed in water and $W_2$ when completely immersed in an unknown liquid. The relative density (specific gravity)of liquid is
Apiece of steel has a weight $W$ in air, $W_1$ when completely immersed in water and $W_2$ when completely immersed in an unknown liquid. The relative density (specific gravity)of liquid is
- A
$\frac{{W - {W_1}}}{{W - {W_2}}}$
- B
$\frac{{W - {W_2}}}{{W - {W_1}}}$
- C
$\frac{{{W_1} - {W_2}}}{{W - {W_1}}}$
- D
$\frac{{{W_1} - {W_2}}}{{W - {W_2}}}$
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