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maka
V=plt
t=V÷pl=69045÷(60×50)=69045÷3000=23,015 cm
L=2(pl+pt+lt)
L=2[(60×50)+(60×23,015)+(50×23,015)]
L=2[3000+1380,9+1150,75]
L=2[5531,65]
L=11063,3 cm²