Last answer for the first question and in not sure about the second one
Answer:
r = 5
Step-by-step explanation:
The formula for volume of a cone is 
h = 6
V = 50π

r = 5
The answer to your question is 11
The perimeter of a rectangle is 2*L+2*W. Knowing that length is 99, we do 2*99 to get 198.Do 374-198, which is 176, we know that that is twice the length of the width. Therefore the width is 176/2, which is 88.