A) 88.2%
B) 87.5%
C) 80.5%
D) 81.6%
Correct Answer: B
Solution :
Volume of coffee in hemisphere cup \[=\frac{2}{3}\pi {{r}^{3}}=\frac{2}{3}\times \frac{22}{7}\times {{(4)}^{3}}\] \[=\frac{2\times 22\times 64}{21}=134.09\,\,c{{m}^{2}}\] Volume of cone\[=\frac{1}{3}\pi {{r}^{2}}h\] \[=\frac{1}{3}\times \frac{22}{7}\times {{(8)}^{2}}\times 16\] \[\,=\frac{1\times 22\times 64\times 16}{2\grave{\ }1}\] \[=1072.76\,\,c{{m}^{2}}\]
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