The poet, A.K Ramanujan, describes time, how time affects different cities. The poem discusses different cities and how time is involved in those cities. While beating their gongs around the clock, the clock strikes, and time flies, leading to some changes occurring in the city. As time passes, every single hour of the clock represents the changes in the city. Once the old-time ends, everything starts from the beginning as a new time arrives.

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?