A body cools according to Newton’s law from 100°C to 60°C in 20 minutes The temperature of the surrounding being 20 °C. How long will it take to cool down to 30 °C?
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1 hour
Let θ°C be the temperature of the body at time t. The temperature of the surrounding is given to be 20° C. ∴ the body will cool down to 30° C in 60 minutes, i.e. in 1 hour.
1 hour
Let θ°C be the temperature of the body at time t. The temperature of the surrounding is given to be 20° C. ∴ the body will cool down to 30° C in 60 minutes, i.e. in 1 hour.
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