Certain quantity of water cools from \( 70^{\circ} \mathrm{C} \) to...

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Certain quantity of water cools from \( 70^{\circ} \mathrm{C} \) to \( 60^{\circ} \mathrm{C} \) in the first 5 minutes and to \( 54^{\circ} \mathrm{C} \) in the next 5 minutes. The temperature of
P the surroundings is:
(2014)
WV
(a) \( 45^{\circ} \mathrm{C} \)
(b) \( 20^{\circ} \mathrm{C} \)
(c) \( 42^{\circ} \mathrm{C} \)
(d) \( 10^{\circ} \mathrm{C} \)
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