A) \[5{}^\circ C\]
B) \[6{}^\circ C\]
C) \[7{}^\circ C\]
D) \[7.5{}^\circ C\]
Correct Answer: D
Solution :
\[Q=30\times 3.5167=105.5\,\,kW\] \[{{m}_{w}}\times {{c}_{p}}\,({{t}_{i}}-{{t}_{v}})=Q\] \[\frac{20\times 1000}{3600}\times 4.187\,(12-{{t}_{0}})=105.5\] \[{{t}_{0}}=12-45=7.5{}^\circ C\]You need to login to perform this action.
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