Question

A 2cm thick slab of commercial thermocouple,
100 cm2 in cross-section and having thermal
conductivity 2 x 104 cal sec-cm-- (Cº)-1 has
insulating regions differing by 100°C. The
quantity of heat flowing through it in a day will
be -
(1) 20.4 kcal
(2) 43.2 kcal
(3) 86.4 kcal
(4) 63.6 kcal​

Answer 1

Explanation:

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Answer 2

I think the answer is 3 option......