Pb$2$: Laboratory filtration conducted at constant pressure drop on a slurry of calcium carbonate in water gave the data as shown in Table. The filter area was $440c{m}^2.$ The mass of solid per unit volume of filtrate was $23\mathrm{.}5g\frac{m}{l}t.$ Evaluate the quantities $$ and $R_m.$

Pressure drop is $0\mathrm{.}456kg\frac{f}{c}{m}^2.$ Viscosity of water $0\mathrm{.}886cP.$

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