The total debentures issued = 8,000 debentures of rupee 100 each.
The interest rate = 11%. \[ \text{Total Interest} = \text{Total Value of Debentures} \times \text{Interest Rate} \] \[ \text{Total Interest} = rupee (8,000 \times 100) \times \frac{11}{100} = rupee 88,000 \]

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?