Answer:
The answer is option 4.
Explanation:
First, you have to find the volume of rectangular pyramid using the formula, V = 1/3×base area×h where base area is the rectangle base and h represents height of pyramid :
base area = length×width
= 14 in × 14 in
= 196 in²
V = 1/3×196×9
= 588 in³
Next, you have to find the volume of rectangle prism using, V = l×w×h where l is length, w is width and h is height :
Let l = 14 in,
Let w = 14 in,
Let h = 2 in,
V = 14×14×2
= 392 in³
Lastly, you have to add up both volumes together to find the total volume of air inside skylights :
V = 588 + 392
= 980 in³