A bucket fulI of hot water cools from 75oC to 70oC in time T1, from 70oC to 65oC in time T2 and from 65oC to 60oC in time T3, then

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T1=T2=T3

T1>T2>T3

T1>T2

answer is C.

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Detailed Solution

According to Newton's law of coolingRate of cooling ∝ Mean temperature difference⇒ Fall in temperature Time ∝θ1+θ22−θ0∵ θ1+θ221>θ1+θ222>θ1+θ223⇒ T1

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