• 2021 December(E23) Math Question 20

    Word Problems

    - Distance, Speed, Time

    Speed, Distance, and Time
    Choice H

    Given that we drove 18 miles in 20 minutes at a constant speed. Let’s first find the speed:

    Time=20  min×3=60  min=1  hourTime=20\; min\times 3=60\; min=1\; hour
    Distance=18×3=54  milesDistance=18\times 3=54\; miles
    ∴Speed={54}{1}=54  mph\therefore Speed=\frac\{54\}\{1\}=54\; mph

    So the constant speed is 54 mph. As 54 is less than 55 so this could have been the lowest speed. Therefore, Choice H is correct answer.

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