See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Time taken by the layer of ice to increase its thickness by 2 1 x x x   2 2 2 1 L t ( ) 2K x x     = 2 2 .9 80 (15) (10) 2 .005 10         4 t 9 10 sec  ; t = 25 Hours