FAA General Practice Test

What is the ratio of 10 feet to 30 inches?

2:1 4:1 1:3 5:6

Correct Answer:

4:1

Explanation:

To determine the ratio of 10 feet to 30 inches, it is essential first to convert the measurements to the same unit. Since 1 foot equals 12 inches, 10 feet can be converted to inches by multiplying by 12: 10 feet × 12 inches/foot = 120 inches. Now, the ratio of 120 inches (from 10 feet) to 30 inches can be expressed as: 120 inches : 30 inches. Next, simplifying this ratio involves dividing both numbers by the greatest common factor. The greatest common factor of 120 and 30 is 30: 120 ÷ 30 = 4, and 30 ÷ 30 = 1. Therefore, the simplified ratio is 4:1. This SAMPLEshows that for every 4 parts of the original measurement (10 feet), there is 1 part of the second measurement (30 inches). Thus, the ratio of 10 feet to 30 inches is correctly expressed as 4:1.

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