An ordinary body cools from ' 4 ' to ' 3 ' in ' t ' minutes. The temperature of that body after next 't' minutes is (Assume Newton's law of cooling and room temperature is )

Step-by-step solution

According to Newton's law of cooling, ₁- ₂ t =K [ ₁+ ₂ 2 - ₀ ] where, ₀= temperature of surrounding aligned & 4 -3 t =K [ 4 +3 2 - ] & t =K 5 2 ...(i) & K= 2 5 t aligned After another t min, let the temperature be x. array ll & 3 -x t = 2 5 t [ 3 +x 2 - ] [ using (i) ] & 3 -x= 3 +x-2 5 & 15 -5 x=x+ & 6 x=14 & x= 7 3 array