Answer:
Perimeter= πd or Perimeter= 2πr
Step-by-step explanation:
d= diameter
r = radius
The answer is B.
If you find a common denominator, the process becomes much easier. I hope this was helpful.
Its C
Just took the test and found out it's not infact 5, but it's 25
785.4cm^3
(10÷2)^2*π=25π
25π*10=250π≈785.4