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We can use P1/T1=P2/T2 (where P1=Patm T1=300k)
NOw to lift the weight a force needs to be applied on the weight which is greater than or equal to its weight
hence,F=mg (where F is the minimum force required to lift the weight)
This force can be provided by the pressure (P2) inside the cooker
hence,
F=(P2)A (where A is the area of cross section)
(P2)A=mg
find P2 from this and substitute in the first equation to get the answer
according to ur method P2 is 300k same as P1.. but the answer is 327K
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