A) 301 7.1
B) 3170
C) 301.7
D) 30.17
Correct Answer: C
Solution :
\[\because \]r = 9.6 m, h = 2.8 m \[\because \]\[l=\sqrt{{{h}^{2}}+{{r}^{2}}}=\sqrt{{{(2.5)}^{2}}-{{(0.7)}^{2}}}\] \[=\sqrt{7.84+92.16}=\sqrt{100}=10\,\,m\] \[\therefore \]Curved surface area \[\pi \times 9.6\times 10\] \[=\frac{22}{7}\times 9.6\times 10=301.7\,\,{{m}^{2}}\]You need to login to perform this action.
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