Answer and Explanation:
The computation is shown below:
As we know that the variable cost is the cost that changed with the production
So the variable cost arise from TC should be
VC=0.5Q^2+25Q
= 0.5 × (30)^2+25 × 30
= 1200
And,
AVC is
= VC ÷ Q
= 1200 ÷ 30
= 40