A substance cools from to in minutes

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A substance cools from

75^\circ\text{C}

70^\circ\text{C}

t_1

minutes, from

70^\circ\text{C}

65^\circ\text{C}

t_2

minutes, and from

65^\circ\text{C}

60^\circ\text{C}

t_3

minutes. Then (1)

t_1=t_2=t_3

(2)

t_1<t_2<t_3

(3)

t_1>t_2>t_3

(4)

t_1<t_2>t_3