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Verified answer
Luas= phi r^2484=(22/7)r^2
3388=22. r^2
154=r^2
akar154=r
kell=2 phi r
=2(22/7)(akar154)
=(44/7)(12,40)
=78,00
484 = 22/7 x r x r
484 : 22/7= r x r
154 = r x r
jawabannya adalah akar 154