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3080 = 440/7 x r²
3080 x 7/440 = r²
49 = r²
√49 = r
7 cm = r
lp = 22/7 x r (r+t)
Lp= 22/7 x 7 ( 7 + 20 )
Lp= 22 (27)
Lp= 594 cm²
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