Question
Edward runs with a speed of 3m/s .How long would it take him to run 2km? Give your answer in seconds to four significant figures. Enter a number seconds
Answer
4.3
(236 Votes)
Leonora
Master · Tutor for 5 years
Answer
667.0 second
Explanation
This is a question about one-time speed (instantaneous speed). The formula for speed is the distance divided by the time. Hence, the time it would take for Edward to run
can be determined by dividing the total distance by his running speed.Note that although the distance is given in kilometers (a unit of distance in the International System of Units, or SI), and the speed is given in m/s, the render is expected in seconds. So we need speed also in km/s for two leaves in metric systems.Hence,
So the speed becomes