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=3,14×17,6×17,5
=54,95×27,5
=962,5
2.L=Πr²
616=22/7×r²
r² =616×7/22
=4312÷22
=196
r=√196
=14
diameter=2×r
. =2×14
=28
7 x 3,5 = 17,5
(22:7)x 17,5 x 17,5= 22x 3,5 x 17,5 = 654,5 pangkat 2
itu no. 1