Jawabanmu

2014-04-22T18:52:50+07:00
120dan224 (2x120) dan(2x224)
=240      dan      448

2014-04-22T19:02:28+07:00
L1 = 2(pxl+ pxt + lxt)
= 2(6x5+6x4+5x4)
=2(30+24+20)
=2x74
= 148 cm²

L2 = 2(8x7+8x4+7x4)
= 2(56+32+28)
=2x 116
=232cm²

perbandingan 148 : 232 = 74 :116 = 37: 58

please kalo berkenan jadikan solusi terbaik ya , :) 
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