Question

Which shows the correct expression for finding the volume of the composite figure above?

Answer 1

Answer:

C

Step-by-step explanation:

$composite =cuboid + 3d \: triangle \\ = (l \times w \times h) + ( \frac{1}{2} \times b \times h \times w) \\ = (12 \times 5 \times 7) + ( \frac{1}{2} \times (15 - 12) \times 7\times 5) \\ = (12 \times 5 \times 7) + ( \frac{1}{2} \times 3 \times7 \times 5)$