A copper wire is bent in the shape of square of area 81 cm ² . If the same wire is bent into a semicircular then find radius
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Answer:
the radius of semicircular is 7c.m
Step-by-step explanation:
a×a=81 then a=9 acc. to que 4a= 36 2r+pie(r)=36
14r+ 22r= 36×7 36r= 36×7 then r= (36×7)÷36 so r= 7
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