Questions
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 35 minutes respectively. The ratio of thermal conductivities of the metal is
a
4 : 7
b
7 : 4
c
2 : 1
d
1 : 2
detailed solution
Correct option is B
We know that R=KAΔTdtHere A,ΔT,d and Q are same. hence K1t1=K2t2∴ K1K2=t2t1=3520=74Talk to our academic expert!
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