1.A body cools from 80 ∘C80\,^\circ\text{C}80∘C to 60 ∘C60\,^\circ\text{C}60∘C in 5 minutes. The temperature of the surrounding is 20 ∘C20\,^\circ\text{C}20∘C. The time it takes to cool from 60 ∘C60\,^\circ\text{C}60∘C to 40 ∘C40\,^\circ\text{C}40∘C is:a.500 s500\,\text{s}500sb.25/3 s25/3\,\text{s}25/3sc.450 s450\,\text{s}450sd.420 s420\,\text{s}420sLogin to continueOnly logged in users canattempt or see the solution.
