Question

Robert was able to travel 166.0 miles in 4.000 hours and used 39 liters of gasoline. What was Robert's speed in feet per second?

Answer 1

Answer:

60.87 ft/s

Explanation:

Speed is defined as a ratio between the distance traveled and time. Given a total distance of:

$d = 166.0~mi$

Let's convert it into feet first of all using the conversion factor:

$1~mi = 5280~ft$

We obtain:

$d = 166.0~mi\cdot \frac{5280~ft}{1~mi} = 876480~ft$

Now let's convert the given time into seconds knowing that:

$1~h = 3600~s$

Then:

$t = 4.000~h\cdot \frac{3600~s}{1~h} = 14400~s$

Now let's find the speed:

$v = \frac{d}{t} = \frac{876480~ft}{14400~s} = 60.87~ft/s$