A Water Tank Can Be Filled in 27 Hours by an Inlet

question 69

Short Answer

A water tank can be filled in 27 hours by an inlet pipe and emptied in 36 hours by an outlet pipe. How long will it take to fill the tank if both pipes are left open? __________ hours

Explain the process of cognitive adaptation and its significance in cognitive development.

Comprehend the role of object permanence in cognitive development.

Distinguish between different substages of sensorimotor development.

Understand the application of Piaget's cognitive-developmental theory to real-world observations.

---

Definitions:

ARVN

The Army of the Republic of Vietnam, which was the ground forces of the South Vietnamese military during the Vietnam War.

Catastrophe

A sudden and widespread disaster or calamity that causes significant damage or suffering.

Basic Sanitation

Essential services and practices focused on the management of human waste, wastewater, solid waste, and stormwater to protect human health and the environment.

Gulf of Tonkin Resolution

A 1964 U.S. congressional resolution that gave President Lyndon B. Johnson broad powers to escalate the Vietnam War without a formal declaration of war.