Answer: Alex traveled a distance of 27.0 km in 2.25 hours.
Further Explanation:
Speed is how fast an object moves or how far an object travels per unit time. If the distance traveled and the total time of travel are known, the speed can be calculated using the formula:
[tex]speed \ = \frac{distance}{time}[/tex]
In the problem, we are given:
speed = 12.0 km/hr
time = 2.25 hr
We are looking for the distance traveled by Alex which can be represented by the variable d.
We can solve for d by manipulating the speed formula to get the equation:
distance, d \ = \ (speed)(time)[/tex]
Plugging in our values for speed and time, we get the equation:
[tex]distance \ = \ (12.0 \ \frac{km}{hr})(2.25 \ hr)\\ \boxed {distance,d\ = \ 27.0 \ km}[/tex]
Since the number of significant figures of the given is 3, the answer must be expressed with 3 significant figures, too.
Thus, the distance Alex traveled for 2.25 hours at a speed of 12.0 km/hr is 27.0 km.
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Keywords: speed, distance, kinematics
