Answer:
1) 4 cm
2) 7cm
3) 8 1/6
Step-by-step explanation:
1)
[tex]SA = 2(w*l)+2(w*h)+2(l*h)[/tex]
[tex]228 = 2(9*6)+2(9*h)+2(6*h)[/tex]
[tex]2(9*6)+2(9*h)+2(6*h) = 228[/tex]
[tex]30h + 108 = 228[/tex]
[tex]30h = 228-108[/tex]
[tex]30h = 120[/tex]
[tex]h = 4[/tex]
2)
[tex]V = l*w*h[/tex]
[tex]64h = 448[/tex]
[tex]h = 7[/tex]
3)
[tex]V_1 = 0.12V_2[/tex]
[tex]0.98V_2 = \frac{0.98}{0.12}V_1 = \frac{98}{12}V_1 = \frac{49}{6}V_1 = 8\frac{1}{6}[/tex]
