The temperature of a solid falls from $\;72^{0}C\;$ to $\;60^{0}C\;$ in 10 minutes . How much time will it take to cool from $\;60^{0}C\;$ to $\;52^{0}C\;$ if the temperature of surroundings is $\;36^{0}C\;$ c ?
$(a)\;5\;min\qquad(b)\;10\;min\qquad(c)\;15\;min\qquad(d)\;20\;min$