Answer:
192.5, third option
Step-by-step explanation:
The fastest way to do this is to find the volume of a rectangular prism with these measures and to divide it by 2. This is because a triangle is half of a rectangle, and likewise a rectangular prism is half of a rectangular prism.
So, the volume of a rectangular prism with the sides of 7 by 5 by 11 would be:
7 * 5 * 11 = 385
Divide this by 2.
385/2 = 192.5
Thus, the answer is 192.5.
(You could also find the area of the triangular base, then multiply that by the height.
Area of triangle: 7 * 5 * 0.5 = 17.5
Total volume: 17.5 * 11 = 192.5)
