A) 1 hour
B) 191 hours
C) 19.1 hours
D) 1.91 hours
Correct Answer: C
Solution :
\[t=\frac{Ql}{KA({{\theta }_{1}}-{{\theta }_{2}})}=\frac{mLl}{KA({{\theta }_{1}}-{{\theta }_{2}})}=\frac{V\rho Ll}{KA({{\theta }_{1}}-{{\theta }_{2}})}\] \[=\frac{5\times A\times 0.92\times 80\times \frac{5+10}{2}}{0.004\times A\times 10\times 3600}=19.1\,hours\].
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