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Keliling = π.d
= 22/7 x 70
= 220 cm
biaya = 220 x 25000 = 5.500.000
jadi total biaya nya adlah Rp. 5.500.000,00
2)2πR=Keliling
2 22/7 r=132
44/7.r=132
r=132/ 44/7
r=132x7/44
r=21
luas=πr²
22/7 21.21
=1386
3)k=2πr
2.22/7.35
220.25000=5.500.000