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A beaker full of hot water is kept in a room and it cools from `80^(@)C` to `75^(@)C` in `t_(1)` mminutes , from `75^(@)C` to `65^(@)C` in `t_(2)` minutes and from `70^(@)C` to `65^(@)C` in `t_(3)` min, then

A

`90^(@)C" to "80^(@)C'"in "t_(1)sec.`

B

`80^(@)C" to " 70^(@)C" in " t_(2)sec`.

C

`70^(@)C" to "60^(@)C" in "t_(3) sec`

D

`60^(@)C" to "50^(@)C" in "t_(4) sec`

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The correct Answer is:
C
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