A2. When preparing firewood from timber, $8 \%$ is waste. How many cubic meters of firewood can be obtained from $150 \mathrm{~m}^{3}$ of timber?
(A) 12
(B) 183
(C) 105
(D) 100
(E) 138
A2. Since there is an $8 \%$ waste in preparing sawn timber, from $150 \mathrm{~m}^{3}$ of logs we get $150 \cdot \frac{92}{100}=$ $\frac{3.92}{2}=138 \mathrm{~m}^{3}$ of sawn timber.