Question

Two sections are cut out from a wire of length 25cm. The sections are then used to form two different circles. Find the lowest total area of the circles.

Answer 1

x + y = 25 where x and y are the circumferences of 2 circles

A =[( x /2pi)^2]*pi + [( y /2pi)^2]*pi
A = x^2/4pi + y^2/4pi
now from first equation y = 25-x
plug this into the above equation
then differentiate and equate to 0
solve for x
and find y
calculate the areas using these values

Answer 2

Good job Jimmy

Answer 3

thanx!

Answer 4

Thank you (: