Final answer:
The correct answer is option c. 15'. The total length of the conduit run required to pass over two pipes that are 5' apart is 15'.
Step-by-step explanation:
In order to pass over two pipes that are 5' apart, the conduit run needs to be longer than the distance between the pipes. Since the pipes are 5' apart, the conduit needs to span that distance plus some extra length to ensure it can pass over the pipes. Therefore, the total length required would be the sum of 5' and the extra length needed.
The question pertains to the speed at which water will exit a horizontal pipe when a force is applied. To determine this speed, one would typically use the principles of fluid dynamics, specifically Bernoulli's principle and the equation of continuity. However, the information provided in the question is insufficient to accurately calculate the speed without additional data such as the length of the pipe and the characteristics of the plunger movement. Therefore, it is not possible to derive an exact answer in 200 words or fewer without making assumptions that could lead to inaccurate results. It is important to consider all necessary variables when tackling a physics problem involving fluid flow.