btech maths m2|newton law of cooling|most imp question btech m2|body kept in air 25 cools #btech_m2

   • btech m2 unit-1,2,3,4,5 imp Questions   A body kept in air with temperature 25 ° C cools from 140° C to 80° C in 20° minutes. Find when the body cools down to 35° C