ETEC e Concursos - Regra de Três Simples - Professora Angela

Hello Everyone!! In today's class, we will solve two questions that were already on #ETEC exams about the Simple Rule of Three. Questions: (Mathematics - ETEC/SP - 2019/1) - Question 19 - An office uses a paper shredder, which cuts documents whose content is not intended to be made public into very thin strips. Suppose that the shredder in this office only accepts one sheet at a time, and is capable of performing its function at a speed of 3 meters per minute. Therefore, for a document with 25 pages to be fragmented, considering that each page of this document is 30 cm long, the minimum time to complete the fragmentation of this document is: (A) 1 min 40s (B) 2 min 20 s (C) 2 min 30 s (D) 3 min 50 s (E) 3 min 40 s (Mathematics - ETEC/SP - 2020) - Question 44 - The league is a measurement of length that varies according to the historical period and the country in which it is used. According to the Priberam dictionary, for example, it is equivalent to 5 km in Portugal. It can therefore be estimated that the Brazilian league is larger than the Portuguese one by approximately (A) 76%. (B) 68%. (C) 32%. (D) 24%. (E) 13%. BNCC Skills: EF09MA08: Solve and develop problems involving direct and inverse proportionality relationships between two or more quantities, including scales, division into proportional parts and rate of variation, in sociocultural, environmental and other contexts. I hope you enjoyed the video and learned from the examples. If you did, click the like button so that more people can view it and learn from it. Thank you and a big hug Professor Angela Mathematics Also watch the following videos here on the channel:    • ETEC e Concursos - Regra de Três Simples -...   BASIC MATHEMATICS:    • Matemática Básica   HIGH SCHOOL https://www.youtube.com/playlist?list... This video does not have advertising. Angela Pereira Correia - Professor Angela Mathematics