A track event consists of the following race lengths in meters (m): 100 m, 200 m, 400 m, 800 m, 1,500 m, 5,000 m, 10,000 m. Given 1000 m = 1 kilometer (km), how many km would an athlete run if competing in all the races?

Rationale

An athlete would run 18 kilometers if competing in all the races.

To figure out the total distance in kilometers, we first need to sum up the lengths of all the races. The total comes out to 17,500 meters. Since 1,000 meters is equivalent to 1 kilometer, the total distance can be converted to kilometers by dividing by 1,000. Thus, 17,500 meters is equivalent to 17.5 kilometers, which rounds up to 18 kilometers.

A (17,000 km) YOUR ANSWER

This option misinterprets the conversion factor between meters and kilometers. There are 1,000 meters in a kilometer, not 1 meter in a kilometer. Therefore, the total distance of 17,500 meters would not be equivalent to 17,000 kilometers.

B (18 km) CORRECT

This is the correct answer. The total distance of the races is 17,500 meters. When converted to kilometers (by dividing by 1,000), this distance rounds up to 18 kilometers.

C (18,000,000 km) YOUR ANSWER

This option significantly overestimates the conversion factor between meters and kilometers. There are 1,000 meters in a kilometer, not 1 million. Therefore, the total distance of 17,500 meters would not be equivalent to 18,000,000 kilometers.

D (19,000 km) YOUR ANSWER

This option also misinterprets the conversion factor between meters and kilometers. While it is closer to the correct answer than option A or C, it still overestimates the total distance. The total distance of 17,500 meters, when converted to kilometers, rounds up to 18 kilometers, not 19,000 kilometers.

Conclusion

The total distance of the races in meters is 17,500 meters. When this is converted to kilometers by dividing by 1,000, the result is 17.5 kilometers. Since the question asks for the answer in whole kilometers, this value rounds up to 18 kilometers. Other options either underestimate or significantly overestimate the conversion factor between meters and kilometers, resulting in incorrect answers.

A track event consists of the following race lengths in meters (m): 100 m, 200 m, 400 m, 800 m, 1,500 m, 5,000 m, 10,000 m. Given 1000 m = 1 kilometer (km), how many km would an athlete run if competing in all the races?

An athlete would run 18 kilometers if competing in all the races.

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