Answer:75% ; 50%
Step-by-step explanation:
Answer:
1) 20: 25
2) 15: 3
Step-by-step explanation:
As a first step, convert to cylindrical coordinates. The equation

is a clue to set


then have

and

. Meanwhile, the plane equation tells you to use

So we parameterize the part of the plane within the cylinder with the vector-valued function

The surface integral giving the area of the surface is

where

denotes the surface in question, and the surface element

is

We have



So the area is
X^2=19^2+7^2=361+49=410
Therefore x=20.25