Jawabanmu

Jawaban paling cerdas!
2014-04-21T20:16:49+07:00
A. p = 5/60 × 1620 = 135 cm l = 4/60 × 1620 = 108 cm t = 3/60 × 1620 = 81 cm b. luas permukaan balok = 2 × (pl + pt + lt) = 2 × (135×108 + 135×81 + 108×81) =2 × (14.580 + 10.935 + 8.748) =68.526 cm kuadrat.
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