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Lbal = 2x(35+28+20) =2x83=166 cm2
150 : 166 = 75 : 83
Semoga membantu :D
pjg balok= 7, l= 5, t= 4
Lp kubus : Lp balok
6 : 2 (pl+pt+lt)
6 × : 2 ( [7.5]+[7.4]+[5.4])
6 × 25 : 2 × 83
150 : 166
75 : 83