Perimeter of a sector of a circle whose central angle is $90^{\circ}$ and radius 7 cm is :\

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Professor PC Thomas Classes · Answer

(d): Given, $r=7 \mathrm{~cm}, 	heta=90^{\circ}$ \Perimeter of sector $=2 r+\frac{	heta}{360^{\circ}} 	imes 2 \pi r$\ \ $P=2 	imes 7+\frac{90^{\circ}}{360^{\circ}} 	imes 2 	imes \frac{22}{7} 	imes 7=14+\frac{1}{4} 	imes 44=14+11=25 \mathrm{~cm}$