EDPT Ratio, Rate, and Proportion

Question 1

A car travels 180 miles in 3 hours. At the same rate, how far will it travel in 5 hours?

Accepted Answer

300 miles

Answer

Rate = 180 ÷ 3 = 60 mph. Distance in 5 hours = 60 × 5 = 300 miles.

Question 2

A recipe calls for 2 cups of flour for every 3 cups of sugar. If you use 8 cups of flour, how many cups of sugar are needed?

Accepted Answer

12

Answer

Set up the proportion: 2/3 = 8/x → x = (8 × 3) ÷ 2 = 24 ÷ 2 = 12 cups of sugar.

Question 3

If 5 workers can complete a job in 12 days, how many days will it take 10 workers to complete the same job (assuming constant work rate)?

Accepted Answer

6 days

Answer

Total work = 5 × 12 = 60 worker-days. With 10 workers: 60 ÷ 10 = 6 days.

Question 4

A map has a scale of 1 inch = 25 miles. Two cities are 3.5 inches apart on the map. What is their actual distance?

Accepted Answer

87.5 miles

Answer

Actual distance = 3.5 × 25 = 87.5 miles.

Question 5

The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many students are in the class total?

Accepted Answer

64

Answer

If 3 parts = 24 boys, then 1 part = 8. Girls = 5 × 8 = 40. Total = 24 + 40 = 64 students.

EDPT - Electronic Data Processing Test Practice Test