Digital PSAT Math Practice Question 326: Answer and Explanation

Question: 326

Andrew's sports car has a speedometer that shows a maximum value of 180 miles per hour. Given that there are approximately 1.61 kilometers in one mile, what would be the maximum value of his speedometer (to the nearest whole number) if it were listed in kilometers per hour?

• A. 112 km/hour
• B. 208 km/hour
• C. 290 km/hour
• D. 314 km/hour

Correct Answer: C

Explanation:

(C) Multiply 180 by 1.61 to get the maximum value of the speedometer in kilometers per hour: 180 miles/hour × 1.61 km/mile → the miles cancel → (180 × 1.61) km/hour ≈ 290 km/hour