To find a volume of a cylinder we use the following formula:

Plug in the values:

Take the square:

Multiply the numbers:
B!!!!!!!!!! The answer is 200
EXPLANATION
Added sum is estimated to 200
The sum of the magnitudes will be the magnitude of the sum when the vectors have the same direction.
Answer:
Blank 1 = 53 + 90 = 143
Blank 2 = 143 - 229 = -86
Blank 3 = 0 - 86 = 86