A bucket full of hot water is kept in a room and it cools from 75°C to 70°C in T1 minutes, from 70°C to 65°C in `T_2` minutes and from 65°C to 60°C in `T_3` minutes. Then –

A substance cools from 75^@C to 70^@C in T_1 minute, from 70^@C to 65^@C in T_2 minute and from 65^@C to 60^@C in T_3 minute, then.

A substance cools from 75^@C to 70^@C in T_1 minute, from 70^@C to 65^@C in T_2 minute and from 65^@C to 60^@C in T_3 minute, then.

A bucket full of hot water is kept in a room. It cools from 75^(@)C to 70^(@)C in t_(1) minutes, from 70^(@)C to 65^(@)C in t_(2) minutes and from 65^(@)C to 60^(@)C in t_(3) minutes. Then

A vessel full of hot water is kept in a room and it cools from 80^(@)C to 75^(@)C in T_(1) minutes, from 75^(@)C to 70^(@)C in T_(2) minutes and from 70^(@)C to 65^(@)C in T_(3) minutes Then .

A vessel full of hot water is kept in a room and it cools from 80^(@)C to 75^(@)C in T_(1) minutes, from 75^(@)C to 70^(@)C in T_(2) minutes and from 70^(@)C to 65^(@)C in T_(3) minutes Then .

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 beaker full of hot water is kept in a room. It cools from 80^(@)C to 75^(@)C in t_(1) minutes, 75^(@)C to 70^(@)C in t_(2) minutes and 70^(@)C to 65^(@)C in t_(3) minutes in the same surroundings. Then

A bucket full of hot water cools from 75^@C to 70^@C in time T_1 from 70^@C to 65^@C in time T_2 , and from 65@C to 60^@C in time T_3 , then