1.

Acoording to Newton's law of cooling, the body cools from 110^(@)C" to "60^(@)C at room temperature of 10^(@)C in 1 hour. The body coolsto 30^(@)C after another

Answer»

`(LOG5)/(LOG2)-1"HOURS"`
`(log5)/(log2)+1"hours"`
`(log5)/(log2)"hours"`
`(log2)/(log5)"hours"`

ANSWER :A


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