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k = 22/7 d
616 = 22/7 d
d = 616 : 22/7
d = 21 cm, diamaternya 21cm
r = d : 2
r = 21 : 2
r = 10,5 cm
Dit : jari-jari?
Jawab : K = 2**r
616=2*22/7*r
616=44/7*r
616*7=44r
4312=44r
4312/44=r
98=r
jadi, jari-jarinya 98cm