9 % p.a.
6 % p.a.
12 % p.a.
As per Section 37 of the Indian Partnership Act, 1932, the interest on the amount due to a retiring partner is payable at the rate of 6 % per annum, unless otherwise agreed upon by the partners.

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?