Volume is a measure if the amount of space occupied by that object, and every 3D shapes have volume. To find volume, you need three dimensions which are length, width, and height :D
The answer is 1 lap/3.5 minutes
So, 4 x 3 is 12, so 4 blades cost 79.74 x 3 (because every turbine has 3 blades each) is 318.96
What is the product? I cannot help you if I don't know the product..
False because you dont have the full amount of income you need