A) 981 N
B) 98.1 N
C) 9.81 N
D) 0.98 N
Correct Answer: B
Solution :
\[\frac{F}{\left( \frac{\pi }{4}\times {{(1.25)}^{2}} \right)}=\frac{1000\times 9.81}{\frac{\pi }{4}\times {{(12.5)}^{2}}}\] \[F={{\left( \frac{1.25}{1.25} \right)}^{2}}\times 1000\times 9.81=98.1\,N\]
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