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v=.rkuadrat.t
385=22/7.3,5.3,5.t
385=11.3,5.t
385=38.5t
t=385/38,5
t=10cm
luas selimut = 2 r t
=2.22/7.3,5.10
=2.22.5
=44.5
=220 cmpersegi