News of war is fast becoming a way of life. The moment one picks up a newspaper, one is bombarded with news of wars between different countries, directly or indirectly. It is obvious that the countries at war are enemies and hatred is a part of this enmity. However the success of humanity comes when we rise above this enmity and show our love towards the civilization as a whole. Dr Sadao did the same. He did whatever he could to save the life of a man whom he knew was a war- prisoner. The instant he saw the injured man, he was filled with concern. Ignoring the fact that he was the enemy of his country and he must have killed so many Japanese and might kill even more, if alive, he saved him.
How did Dr. Sadao plan the American prisoner’s escape? (The Enemy)

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?