If using a 100 mm x 3.0 m plastic pipe with an engagement length of 45 mm, what is the number of pipes needed?

To determine the number of pipes needed for your application, you first need to understand the total effective length of each pipe after accounting for the engagement length. Here, you have a plastic pipe that is 3.0 meters long, but with an engagement length of 45 mm, this section will not contribute to the usable length of the pipe.

First, convert the engagement length from millimeters to meters for consistency. The engagement length of 45 mm is equivalent to 0.045 meters. Therefore, the effective length of the pipe after accounting for the engagement is calculated as follows:

Effective length of the pipe = Total length - Engagement length

= 3.0 m - 0.045 m

= 2.955 m.

Now, if you need to cover a specific length with these pipes, you will determine how many pipes are required based on the effective length. Without additional context about the total desired length, the decision on whether 1.47 pipes is logical hinges on the idea that using one pipe only partially covers the requirement, thus necessitating more than one pipe.

If the exact desired length were provided, you could divide that figure by the effective length of 2.955 m to get the precise number of pipes required