Question

A group of seventh-graders are making a documentary about the environment for a science project. The film ends at 4:17 PM. The film starts with a 5 minutes introduction, following which is a section on rainforests, that is 2 minutes long. Then comes a discussion about steps taken to clean the environment, which is twice as long as the section on rainforests. The film ends with an 6-minute conclusion. At what time does the film begin?

Answer 1

The environmental documentary started at 4:00 PM, which is determined by subtracting the total duration of the segments (17 minutes) from the ending time (4:17 PM).

Step-by-step explanation:

To determine the starting time of the seventh-graders' environmental documentary, we need to calculate the total duration of the film's segments and subtract that from the ending time. The introduction is 5 minutes long, the section on rainforests lasts for 2 minutes, and the discussion about cleaning the environment is twice as long as the rainforest section, meaning it is 4 minutes long. Lastly, the film concludes with a 6-minute conclusion segment.

To find the total duration, we simply add up these times: 5 minutes + 2 minutes + 4 minutes + 6 minutes, which equals 17 minutes.

If the film ends at 4:17 PM, we subtract 17 minutes to find that the film began at 4:00 PM.