An aqueous slurry is slip cast in a mold with uniform pores of diameter $1m.$ It is found to take $30$ minutes to form a $4mm$ thick cast layer when slip casting the slurry into this mold. Estimate how long it would take to form a $6mm$ thick fast layer from the same slurry by pressure casting with an applied pressure of $2$MPa. $($The surface tension of water is $0\mathrm{.}07\frac{N}{m}.)$