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Same quantity of ice is filled in each o...

Same quantity of ice is filled in each of the two metal containers P and Q having the same size, shape and wall thickness but made of different materials. The containers are kept in identical surroundings. The ice in P melts completely in time `t_1`, whereas that Q in takes a time `t_2`. The ratio of thermal conductivities of the materials of P and Q is

A

`t_2 : t_1`

B

`t_1 : t_2`

C

`t_1^2 : t_2^2`

D

`t_2^2 : t_1^2`

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TARGET PUBLICATION-Thermal Properties of Matter-Exercise
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