1.sebuah limas persegi panjang garis pelukisnya 10 cm dan rusuk alas 12. berapa volumenya 2. balok mempunyai volume 1536 jika p:l:t = 4:3:2, berapa luas permukaanya? 3. banyak ruauk pada prisma segi n adalah?
Dell22
Kalo no 1 nggak tau.. 2. misal: p= 4x, l=3x,t=2x v = p x l x t 1536 = 4x x 3x x 2x 1536 = 24x³ 1536 = x³ 24 64 = x³ ∛64 = x 4 = x...................... p= 4 x 4= 16, l= 3 x 4= 12, t= 2 x 4= 8 Lp = 2 (pl + pt + lt) Lp = 2 (16.12 + 16.8 + 12.8) Lp = 2 ( 416 ) Lp = 832
3. banyak rusuk prisma segi n = n x 3
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sitinurani21
2). V = 4x . 3x . 2x 1536 = 24 x³ x³ =1536/24 x³ = 64 x = 4 panjang = 4 x 4 = 16 lebar = 3 x 4 = 12 tinggi = 2 x 4 = 8 Lp = 2 (16.12 + 16 . 8 + 12 . 8 ) 2 ( 192 + 128 + 96 ) 2 ( 416 ) 832
2. misal: p= 4x, l=3x,t=2x
v = p x l x t
1536 = 4x x 3x x 2x
1536 = 24x³
1536 = x³
24
64 = x³
∛64 = x
4 = x...................... p= 4 x 4= 16, l= 3 x 4= 12, t= 2 x 4= 8
Lp = 2 (pl + pt + lt)
Lp = 2 (16.12 + 16.8 + 12.8)
Lp = 2 ( 416 )
Lp = 832
3. banyak rusuk prisma segi n = n x 3
1536 = 24 x³
x³ =1536/24
x³ = 64
x = 4
panjang = 4 x 4 = 16
lebar = 3 x 4 = 12
tinggi = 2 x 4 = 8
Lp = 2 (16.12 + 16 . 8 + 12 . 8 )
2 ( 192 + 128 + 96 )
2 ( 416 )
832