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A body cools from 60°C to 50°C in 9 minu...

A body cools from `60°C` to `50°C` in `9` minutes. What will be the temperature after next `9` minutes? [Temperature of surrounding is `20°C`]

A

`40°C`

B

`45°C`

C

`48°C`

D

`42.5°C`

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