Hot water cools from to in the first 10 minutes and to in the next 10 minutes

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

Problem

Hot water cools from

60^{\circ}\text{C}

50^{\circ}\text{C}

in the first 10 minutes and to

42^{\circ}\text{C}

in the next 10 minutes. The temperature of the surroundings is: (1)

25^{\circ}\text{C}

(2)

10^{\circ}\text{C}

(3)

15^{\circ}\text{C}

(4)

20^{\circ}\text{C}