The diagram and description are not correct.
I think I've corrected them,
Find the value of x (on the right vertical side) to find the minimum time to travel to the top right corner of the "forest".
The forest can be travelled through at 3 km/h and the "clear" area can be travelled through at 5 km/h.
The graphic shows 2 km at the bottom and x km on the right side.
A man wants to get from A to B in the least amount of time.Code:* B - | : |d-x: | : *P : * | d * | : * |x : * | : * | : A * - - - - - - - - *C - : - - - 2 - - - :
He walks through the "forest" from point A to point P
. . then walks in the "clear" from point P to point B.
He walks distance at 3 km/hr.
. . This takes hours.
He walks distance at 5 km/hr.
., . This takes hours.
The total time is: .
And that is the function we must minimize.,