Two vessels of different materials are similar in size in every respect. The same quantity of ice filled in them gets melted in $20$ minutes and $30$ minutes. The ratio of their thermal conductivities will be
Two vessels of different materials are similar in size in every respect. The same quantity of ice filled in them gets melted in $20$ minutes and $30$ minutes. The ratio of their thermal conductivities will be
- A
$1.5$
- B
$1$
- C
$2/3$
- D
$4$
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- [JEE MAIN 2020]
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- [JEE MAIN 2019]
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