Age and Volume Calculations

In this video, Professor Valter Coelho explains two math problems involving percentages. The first problem involves calculating the ages of three individuals based on given percentages. The second problem requires determining the additional amount of lemon juice needed to serve a specific number of cups. The video concludes with a call to action for viewers to subscribe and engage with the channel.

What is the main topic discussed in the video?

• Geometry

• Percentages

• Trigonometry

• Algebra

If Julia is 20 years old, what is Lilia's age if it is 50% of Julia's age?

• 20 years

• 5 years

• 10 years

• 15 years

What percentage of Lilia's age is G's age?

• 60%

• 80%

• 50%

• 70%

What is the sum of the ages of Julia, Lilia, and G?

• 35 years

• 30 years

• 37 years

• 40 years

How many liters of lemon juice did Lorena's mother initially prepare?

• 3 liters

• 1.5 liters

• 2 liters

• 2.5 liters

How many milliliters are there in 18 cups of 250ml each?

• 5500 ml

• 4500 ml

• 4000 ml

• 5000 ml

Convert 4500 ml to liters.

• 4 liters

• 5.5 liters

• 4.5 liters

• 5 liters

How many more liters of lemon juice are needed to serve 18 cups of 250ml each?

• 2.5 liters

• 1.5 liters

• 1 liter

• 2 liters

What is the percentage increase in the quantity of lemon juice needed?

• 60%

• 70%

• 80%

• 50%

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