A tank can be filled by two pipes. The first pipe can fill the tank in 4 hours, and the second pipe can fill it in 6 hours. How long will it take to fill the tank if both pipes are used simultaneously?

Sat, 02 May 2026 09:57:52 +0000

**A tank can be filled by two pipes. The first pipe can fill the tank in 4 hours, and the second pipe in 6 hours. How long will it take to fill the tank if both pipes work together?** In a quiet moment of everyday problem-solving, many US households and businesses confront a common scenario: how long does it really take to fill a tank when multiple sources supply it? When two inflow pipes operate simultaneously, their combined efficiency reveals not just a math puzzle—but a practical insight into time, workflow, and resource management. With increasing focus on household efficiency and commercial operations, this question reflects growing curiosity about optimal usage of shared resources. Understanding how to calculate combined fill times helps people make clearer decisions—whether managing home water systems, fire sprinklers, or industrial tanks. The scenario where Pipe A fills a tank in 4 hours and Pipe B fills it in 6 hours invites a straightforward breakdown of work rates, revealing a shared rhythm that’s both intuitive and instructive. ### How Working Together Changes the Fill Time