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A gas can be taken from \( A \) to \( B \) via two different processes \( A C B \) and \( A D B \). When path \( A C B \) is used \( 60 \mathrm{~J} \) of heat flows
\( \mathrm{P} \) into the system and \( 30 \mathrm{~J} \) of work is done by the system. If path \( A D B \) is used work done by the system is \( 10 \mathrm{~J} \). The heat
W flow into the system in path \( A D B \) is
[JEE (Main) 2019]
(a) \( 80 \mathrm{~J} \)
(b) \( 100 \mathrm{~J} \)
(c) \( 20 \mathrm{~J} \)
(d) \( 40 \mathrm{~J} \)
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