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[" Certain quantity of water cools from "70^(@)C" to "60^(@)C],[" in the first "5" minutes and to "54^(@)C" in the next "],[5" minutes.The temperature of the surroundings is "],[" (1) "45^(@)C],[" (2) "20^(@)C],[" (3) "42^(@)C],[" (4) "10^(@)C]

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