Sam completed a race that is 7 kilometers long. Which distance is closest to the number of miles Sam ran? (A) 4.34 miles (B) 6.38 miles (c) 7.62 miles (D) 11.3 miles
The correct answer and explanation is:
Correct Answer: (A) 4.34 miles
To determine how many miles Sam ran when he completed a 7-kilometer race, we need to convert kilometers into miles. The standard conversion factor is:
1 kilometer ≈ 0.6214 miles
We multiply the number of kilometers by this conversion factor:
7 kilometers × 0.6214 miles/kilometer = 4.3498 miles
Now, round the result to two decimal places:
4.3498 miles ≈ 4.35 miles
Among the options provided, the one closest to 4.35 miles is:
(A) 4.34 miles
This is the correct and most accurate choice when compared to the actual conversion.
Understanding this concept is important because different countries use different systems of measurement. The metric system, used in most parts of the world, measures distances in kilometers. In contrast, the United States commonly uses the imperial system, which includes miles for measuring longer distances. Therefore, conversions like this are helpful in interpreting or comparing distances when switching between systems.
When converting between units, always use a reliable conversion factor. In this case, 1 kilometer is approximately 0.6214 miles. Multiplying the number of kilometers by that factor will give you the equivalent distance in miles. Always be cautious to perform multiplication in the correct direction to avoid major errors in estimating distance.
In real-world situations like races or travel, converting units helps in understanding how far someone has gone. It is especially useful when planning trips or comparing performance in international sports competitions. So, Sam’s 7-kilometer race is about 4.34 miles, making option (A) the best and most accurate answer.