tolong no. 7 pake cara

Tentang Luas Permukaan

 

Jawaban:

 

Dik:

 

P, l ,t  = 12, 8, 4 m = 120, 80, 40 dm

 

Dit:

 

Lp = …?

 

Lp = 2 x ( pl + pt + lt)

Lp = 2 x (120 x 80 + 120 x 40 + 80 x 40)

Lp = 352.000 dm²

 

Jawaban : B

    

2(pxl)+2(pxt)+2(lxt)
2(12x8) + 2(12x4) +2(8x4)
192 + 96 + 64
=352dm

=352mx1000=B.352.000dm

maaf kl slh