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r = 28 cm
berputar sebanyk 800 kali
mka :
K = 2 x 22/7 x r
= 2 x 22/7 x 28
= 176 cm
jdi jarak y ditempuh = 176 x 800 = 140.800 cm = 1.408 m
=2 x 22/7 x 28
=176 cm²
Jarak=keliling x banyak putaran
=176 x 800
=140.800 cm