Mastering Inverse Proportions: Ratios & Variable Changes

If 4 workers can complete a task in 12 hours, how long will it take 6 workers to complete the same task?

• 8 hours

• 12 hours

• 6 hours

• 10 hours

A car travels 300 miles on 10 gallons of gas. How many gallons will it need to travel 450 miles?

• 12 gallons

• 20 gallons

• 15 gallons

• 10 gallons

If 5 machines can produce 100 items in 8 hours, how many items can 8 machines produce in the same time?

• 140 items

• 180 items

• 120 items

• 160 items

A recipe requires 3 cups of flour to make 12 cookies. How many cups of flour are needed to make 30 cookies?

• 7.5 cups

• 5 cups

• 10 cups

• 4.5 cups

If a tank can be filled by 2 pipes in 15 minutes, how long will it take to fill the tank using 3 pipes?

• 5 minutes

• 7.5 minutes

• 12 minutes

• 10 minutes

A group of 10 students can complete a project in 5 days. How many days will it take for 15 students to complete the same project?

• 4 days

• 3 days

• 7 days

• 6 days

If 12 people can paint a house in 10 days, how many days will it take for 8 people to paint the same house?

• 15 days

• 10 days

• 20 days

• 12 days

A car can travel 240 miles on 8 gallons of gas. How many miles can it travel on 5 gallons?

• 100 miles

• 180 miles

• 150 miles

• 200 miles

If 6 workers can build a fence in 20 days, how many days will it take for 3 workers to build the same fence?

• 25 days

• 40 days

• 50 days

• 30 days

A factory produces 500 toys in 10 hours. How many toys can it produce in 15 hours?

• 900 toys

• 500 toys

• 600 toys

• 750 toys