Answer:
[tex]H_B=169.2m[/tex]
Step-by-step explanation:
From the question we are told that:
Average height of blocks [tex]H_{ABC}=145.6[/tex]
Height of block A [tex]H_A=128.7[/tex]
Height of block C [tex]H_C=138.9[/tex]
Generally the equation for Height of block C is mathematically given by
Since
[tex]H_{ABC}=\frac{H_A+H_B+H_C}{3}[/tex]
Therefore
[tex]H_B=(H_{ABC}*3)-(H_A+H_B)[/tex]
[tex]H_B=(145.6*3)-(128.7+138.9)[/tex]
[tex]H_B=169.2m[/tex]
