A cup of coffee at cools to in minutes in a room whose temperature is

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

Problem

A cup of coffee at

80^{\circ}\text{C}

cools to

65^{\circ}\text{C}

5

minutes in a room whose temperature is

20^{\circ}\text{C}

. Assuming the same conditions continue, determine the temperature of the coffee after a total of

15

minutes. (a)

43.3^{\circ}\text{C}

(b)

52.4^{\circ}\text{C}

(c)

45.3^{\circ}\text{C}

(d)

35.0^{\circ}\text{C}