A body cools at the rate of 1.5 °C/min w...

A body cools at the rate of 1.5 °C/min when its temperature is 30 °C above that of the surrounding. At what temperature above the surrounding will it cool at the rate of 1 °C/min?

`10^@C`

`15^@C`

`20^@C`

`25^@C`

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