An irrigation canal has a rectangular cross section. At one point where the canal is $18\mathrm{.}2$ m wide and the water is $3\mathrm{.}65$ m deep, the water flows at $2\mathrm{.}65$ cm$/$s$.$ At a second point downstream, but on the same level, the canal is $16\mathrm{.}9$ m wide, but the water flows at $10\mathrm{.}8$ cm$/$sc$.$ How deep is the water at this point?