9
QuizMultiple Choice

Dimensional Analysis

Question 9 • CR SS Chemistry S2 2018/19 2026

Sarah wants to find out how much time it would take to drive from her home to New York. At an average, she would drive at 55 miles per hour. If the distance to be covered is 1150 km and a mile equals 1.61 km, how much time will the trip take (to the nearest hour)?

Answer
A
13 hours
B
21 hours
C
29 hours
D
34 hours

Explanation

Convert the distance to miles: 1,150 ÷ 1.61 ≈ 714 miles. At 55 miles per hour, the driving time is about 714 ÷ 55 ≈ 13 hours. So the trip will take about 13 hours, choice A.

AI-written and checked against the verified answer.

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