Question

Find the cross-sectional area of a conductor in millimeters squared when the diameter of the conductor is 25 millimeters. pi must be calculated as 3.14159. (round the final answer to two decimal places.)

Answer 1

The area of the cross section for this case is a circle.
Therefore, the area is given by:

`A = \pi * r ^ 2`
Where,
r: radius of the circle
Substituting values we have:

`A = 3.14159 * (25/2) ^ 2 A = 490.8734375 mm ^ 2`
Rounding to two decimal places:

`A = 490.87 mm ^ 2`
Answer:
The cross-sectional area of a conductor in millimeters squared is:
A = 490.87 mm ^ 2