Variation word problems

Variation word problems

Multiple Choice

The number of kilograms of water in a person’s body varies directly as the person’s mass. A person with a mass of 90 kg contains 60 kg of water. How many kilograms of water are in a person whose mass is 75 kg?

• 50 kg water

• 72 kg water

• 150 kg water

• 94 kg water

Multiple Choice

When building a house, the number of days required to build is inversely proportional to with the number of workers. One house was built in 85 days by 5 workers. How many days would it take to build a similar house with 25 workers?

• 17

• 20

• 30

• 425

Multiple Choice

Mabel keeps track of how much money y she saves in x months. In two months Mabel saves up $300, and in six months, she saves up $900.

Is this an example of a direct or indirect variation?

• direct

• indirect