Since the formula to find the volume of a cylinder is V= πr^2h, where r is the radius, start by plugging in all the known values: 18,136.64=(3.14)r^2(16)
Then, to isolate r, multiply 3.14 and 16 and divide its product from both sides:
18136.64=50.24r^2
361=r^2
Now, square root both sides to solve for r and you get r= 19