Jawabanmu

2014-09-07T22:07:36+07:00
L=2 phi rt
2200=2.22/7.r.25
2200.7/22=50.r
700=50.r
14=r

Lpermukaan=2 phi r (r+t)
LP=2.22/7.14.(14+25)
LP=88.39
LP=3432 cm²
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