Grades 3-4 Video Solutions 2021-video 2021 3-4/15

Video Transcription

Video Summary

The problem involves determining the height of the shortest ladder out of four fire escape ladders on a building. Given the building height of 48 and information that one ladder (36) reaches from the bottom to the top of the shorter ladder, it's necessary to find the lengths of gaps above and below the shortest ladder. By subtracting known ladder heights from 48, the gaps are found to be 12 and 16, respectively. Adding these gaps with the shortest ladder should equal 48, resulting in the shortest ladder's height being 20. Thus, the answer is D: 20.

Keywords

fire escape ladders

building height

gap calculation

shortest ladder

ladder height