Two prominent Harappan sites are:
1. Mohenjo-Daro – Located in present-day Pakistan, it was one of the most advanced cities of the Indus Valley Civilization.
2. Harappa – Located in Pakistan, Harappa is another key site of the Indus Valley Civilization, known for its well-organized city planning and drainage systems.
Which dynasty issued the first gold coin in India?

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?