How much does it take for a student running at an average speed of 5 m/s to cover a distance of 2 km

7 min 7 sec

Explanation:

1000 meters per km

2000km÷5=400

400÷60=6.66

400 min

Explanation:

Average speed = Distance ÷ Time

According to the question,

We have to find time which takes run the given distance.

Time = Distance ÷ Speed

Time = 2 × 1000 m ÷ 5 m/s

Time = 2000 ÷ 5

Time = 400 minutes

It takes 400 minutes.

If we find it in hours,

400 ÷ 60 h = 6.67 hours

Hope this helps you :-)

Let me know if you have any other questions :-)

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form