A) \[49.50\]
B) \[59.60\]
C) \[69.60\]
D) \[79.87\]
Correct Answer: C
Solution :
\[\frac{{{P}^{o}}-{{P}_{S}}}{{{P}^{o}}}=\frac{w/m}{W/M};(640-600)/640=wM/mW\] \[40/640=2.175\times 78/m\times 39.08\] \[m=2.175\times 78\times 640/39.08\times 40=69.458\cong 69.60\]You need to login to perform this action.
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