Area(A)=462cm square,length of the arc(l)=?,radius(r)=21cm.find the length of the arc?
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Answer:
the formula of length of arc =angle\360°×πr^2
on putting all the given values
l=1/4×22/7×21×21
=693/2
= 346.5
the question is incomplete so
. let us pretend it as a quadrant
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