Final answer:
The provided question seems to be about specific scaffold load standards which are typically in the range of 25 to 75 pounds per square foot, but without the exact standard or answer options, a precise answer cannot be provided. The physics problem about scaffold and tension requires understanding of static equilibrium concepts to solve.
Step-by-step explanation:
The question about the total load on a scaffold is related to engineering and workplace safety standards, which could appear in a professional certification or training course rather than in a typical school curriculum. The correct answer option to the total load on the platform of a light-trades scaffold shall not average more than is missing from the provided context, hence I cannot provide an exact answer; however, common standards often specify a load around 25 to 75 pounds per square foot depending on the type and use of scaffold. This is an engineering safety detail rather than a mathematical or physics problem to solve. For the physics problem provided, we have a scaffold with a uniform 40.0-kg mass and an 80.0-kg painter. This would be a statics problem, typically found in physics or engineering courses.
For the specifics of the second part:
- Identify that the sum weight of 20 men exceeds 3,500 pounds.
- Recognize this is a health and safety concern because the weight exceeds the safety limits for water taxis, potentially causing unsafe conditions.