NEET Physics Mechanical Properties of Fluids Questions Solved

In making an alloy, a substance of specific gravity ${\mathrm{s}}_{1}$ and mass ${\mathrm{m}}_{1}$ is mixed with another substance of specific gravity ${\mathrm{s}}_{2}$ and mass ${\mathrm{m}}_{2}$ ; then the specific gravity of the alloy is

(a) $\left(\frac{{\mathrm{m}}_{1}+{\mathrm{m}}_{2}}{{\mathrm{s}}_{1}+{\mathrm{s}}_{2}}\right)$                               (b) $\left(\frac{{\mathrm{s}}_{1}{\mathrm{s}}_{2}}{{\mathrm{m}}_{1}+{\mathrm{m}}_{2}}\right)$

(c) $\frac{{\mathrm{m}}_{1}+{\mathrm{m}}_{2}}{\left(\frac{{\mathrm{m}}_{1}}{{s}_{1}}+\frac{{m}_{2}}{{\mathrm{s}}_{2}}\right)}$                            (d) $\frac{\left(\frac{{\mathrm{m}}_{1}}{{\mathrm{s}}_{1}}+\frac{{\mathrm{m}}_{2}}{{\mathrm{s}}_{2}}\right)}{{\mathrm{m}}_{1}+{\mathrm{m}}_{2}}$

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