1.

A hot body is placed in cooler surroundings. When the body temperature is 75^(@)C, the rate of cooling is 4^(@)C/ min. When it is 55^(@)C, the rate of cooling is 2^(0)C/ min. The temperature of the surroundings is

Answer»

`20^(@)` C
`25^(@) C `
`30^(@)C `
`35^(@)` C

Answer :D


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