PSAT Math Grid-Ins Question 78: Answer and Explanation

Question: 78

There are about 3 feet per meter and 1,000 meters per kilometer. Two cities are 1,800,000 feet apart; about how many kilometers apart are the two cities?

Correct Answer: 600

Explanation:

600

Difficulty: Easy

Category: Unit Conversion

Getting to the Answer: For unit conversions, start by deciding whether to multiply or divide. The question asks you to convert from feet to kilometers, so you should divide because a foot is a smaller measurement than a kilometer is. In other words, there will be fewer kilometers than feet. Convert feet into meters, and then meters into kilometers:

Grid in 600.

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