A Water Tank Can Be Filled in 28 Hours by an Inlet

question 39

Multiple Choice

A water tank can be filled in 28 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?

• A) 64 hours
• B) 32 hours
• C) 126 hours
• D) 36 hours
• E) 72 hours

---

Definitions:

Uses and Gratification Theory

A theory that explores how individuals actively seek out media to satisfy specific needs and desires, such as information, personal identity, integration and social interaction, or entertainment.

Target Public

The specific group of people at whom public relations or marketing activities are directed, often a key audience for a company or organization.

Social Proof

The psychological phenomenon where people assume the actions of others in an attempt to reflect correct behavior for a given situation.

Group Conformity

The phenomenon where individuals in a group tend to match their beliefs, attitudes, and behaviors to those of the group.