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An object is cooled from 75 ^(@)Cto 65^...

An object is cooled from `75 ^(@)Cto 65^(@)C` in 2 min in a room at `30^(@)C` .the time taken to cool another identical object from `55^(@)C` to `45^(@)C` in the same room , in minutes is

A

4

B

5

C

6

D

7

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The correct Answer is:
A
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TARGET PUBLICATION-KINETIC THEORY OF GASES AND RADIATION -Competitive thinking
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  2. A liquid cools from 70 °C to 60 °C in 5 minutes. If the temperature of...

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  3. An object is cooled from 75 ^(@)Cto 65^(@)C in 2 min in a room at 30^...

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  4. A body cools from 100° C to 70° C in 8 second. If temperature of surro...

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  5. A body cools from a temperature 3 T to 2 T in 10 minutes. The room tem...

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  6. Certain quantity of water cools from 70^(@)C to 60^(@)C in the first 5...

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  7. Rate of cooling of body is 0.5^(@)C/min, when the system is 50^(@)C ab...

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  8. Two thermometers A and B are exposed in sunlight. The bulb of A is pai...

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