GRANDEZAS DIRETAMENTE E INVERSAMENTE PROPORCIONAIS

Mariana trains for swimming in a pool in her city. She will participate in a swimming championship where the pool is 400 meters. In the table below, her performance in swimming the pool is represented. Fill in the table and answer how long it will take her to complete the championship race, maintaining the same proportion?

• 200 meters: 140 seconds, 400 meters: 280 seconds

• 200 meters: 150 seconds, 400 meters: 300 seconds

• 200 meters: 130 seconds, 400 meters: 260 seconds

• 200 meters: 160 seconds, 400 meters: 320 seconds

(Saresp) A painter made a table relating the surface area to be painted, the time spent painting that surface, and the amount of paint. To paint a surface of 200 m², the time and amount of paint used are, respectively:

• 10 h and 20 L

• 20 h and 30 L

• 20 h and 20 L

• 40 h and 20 L

What is the speed of a car that takes four hours on a journey, knowing that it would take eight hours on the same journey if it were traveling at 40 km/h?

• 20 km/h

• 40 km/h

• 60 km/h

• 80 km/h

• 100 km/h

To hire three machines that will repair rural roads in a municipality, the City Hall prepared a notice that, among other clauses, provided: - Each interested company can only register one machine to compete in the notice; - The total resources allocated to hire the set of three machines is R$ 31,000.00; - The amount to be paid to each company will be inversely proportional to the age of the machine registered by the company for this notice. The three winning companies of the notice registered machines with 2, 3, and 5 years of age. How much will the company that registered the machine with the highest age of use receive?

• R$ 3,100.00

• R$ 6,000.00

• R$ 6,200.00

• R$ 15,000.00

• R$ 15,500.00

Para construir um muro com 2 metros de altura e 25 metros de comprimento, os operários levaram 25 dias. Quantos dias esse mesmo grupo de operários levaria para construir um muro de 1 metro de altura e 20 metros de comprimento?

• 7 dias

• 10 dias

• 12 dias

• 14 dias

• 15 dias

Uma equipe de trabalhadores levou 30 dias para construir uma estrada de 3 km. Quantos dias levariam para construir uma estrada de 1 km, mantendo a mesma eficiência?

• 10 dias

• 15 dias

• 20 dias

• 25 dias

Se um pintor leva 15 horas para pintar uma parede de 150 m², quanto tempo ele levaria para pintar uma parede de 50 m², mantendo a mesma taxa de trabalho?

• 3 horas

• 5 horas

• 7 horas

• 10 horas

Um carro viaja a uma velocidade de 60 km/h e leva 5 horas para completar uma viagem. Quanto tempo levaria para completar a mesma viagem a uma velocidade de 30 km/h?

• 5 horas

• 7 horas

• 10 horas

• 15 horas