A) \[346.5\text{ }c{{m}^{2}}\]
B) \[340\text{ }c{{m}^{2}}\]
C) \[355\text{ }c{{m}^{2}}\]
D) \[342\text{ }c{{m}^{2}}\]
Correct Answer: A
Solution :
(a): 1 minute \[=6{}^\circ \] \[\therefore \] 60 minutes \[=360{}^\circ \] Area \[=\pi {{r}^{2}}\times \left( \frac{\theta }{360{}^\circ } \right)\]; Since, \[\theta =360{}^\circ \] \[\therefore \] Area \[=\pi {{r}^{2}}\] \[\therefore \] Area \[=\pi {{(10.5)}^{2}}c{{m}^{2}}\]
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