Answer:

Step-by-step explanation:
Given
y jointly varies to x and z^2
Required
Find the equation
We start by writing out the variation;

Write as equation

Substitute values of x,y and z



Divide both sides by 7




Substitute k in 

The answer is B.L it is want is in the center
1890.56 / 4 = 472.64 / pi = 150.4459846
square root of 150.4459846 = 12.26564245 = radius
12.26564245 x 2= 24.53128489
the answer is number 2
Answer:
Same!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!