The Perimeter of a sector of a Circle of are 25sq.cm is 20 cm. Find the area of a sector.
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Step-by-step explanation:
area of a circle =2*pi*r=25*pi
r=25/2
p of a sector =2*l/r=20
2*l/(25/2)=20
l=125
area =r*l*2
(25/2*125)=
3125/2
781.25cm ^2
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