A) 8.40cm
B) 16.8cm
C) 4.20cm
D) 8.90cm
Correct Answer: A
Solution :
As per question, length of an arc of a sector of angle, \[\theta =60{}^\circ \] \[l=\frac{\theta }{360{}^\circ }\times 2\pi r\] \[\Rightarrow \,\,\,8.8=\frac{60}{360{}^\circ }\times 2\times \frac{22}{7}\times r\] \[\Rightarrow \,\,8.8=\frac{1}{3}\times \frac{22}{7}\times r\Rightarrow r=\frac{8.8\times 21}{22}\]\[\therefore \,\,\,\,\,r=8.40\,\,cm\]You need to login to perform this action.
You will be redirected in
3 sec