‘Ex situ’ approach for conserving biodiversity:
- Ex situ conservation refers to the conservation of species outside their natural habitats. This method is used when in situ conservation is not possible. The main goal is to preserve species by maintaining them in controlled environments.
Examples:
1. Botanical gardens: These are places where plants are grown and conserved outside their natural habitat. They help protect endangered plant species and provide research opportunities.
2. Zoos and aquariums: These institutions house endangered animals in artificial environments and play a crucial role in breeding programs for species at risk of extinction.

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?