Jawabanmu

2014-03-31T19:35:09+07:00
A, 50×20×25=25000 cm3 ---------'------ b.2 (50×20)+2 (50×25)+2 (20×25)=2000+2500+1000=5500 cm
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2014-03-31T19:37:03+07:00
Volume = p x l x t
           = 50 x 20 x 25
           = 25000 cm³

LP = 2 (pl + pt + lt)
     = 2 (1000 + 1250 + 500)
     = 2 x 2750
     = 5500 cm²
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