luas permukaan balok 15dm,12dm,25dm adalah...cm²

LP balok = 2 (pxl+pxt+lxt )
               = 2 (25x12 + 25x15+ 12 x15)
               = 2(300+375+180)
               =2 (855)
               =1.710 dm²
jawab.C

Mapel Math
Bab Bangun Ruang

Penyelesaian :
Luas permukaan balok
= 2 × ( p × l ) + ( p × t ) × ( l × t )
= 2 × ( 25 × 12 ) + ( 25 × 15 ) + ( 12 × 15 )
= 2 × ( 300 + 375 + 180 )
= 2 × 855
= 1710 cm^2
Opsi ===> C

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