Question

chris can run at a constant speed of 12 km/h. How ling will it take him to run from his home to the park, a distance of 0.8 km?

Answer 1

Recall that distance = speed times time. Thus, time = distance / speed.

Here:

time = distance / speed = 0.8 km / 12 km/hr = 1/15 hr.

Note that 1/15 hr = 1/15 (60 min) = 4 minutes

Answer 2

Answer: 4 minutes or about 0.067 hour

Explanation:

Given : Chris can run at a constant speed of 12 km/h.

Distance traveled by him = 0.8 km

The formula we use here is
`\text{Time}=\frac{\text{Distance}}{\text{Speed}}`

Therefore, the time taken by him to travel a distance of 0.8 km will be :-

`\text{Time}=(0.8)/(12)=(1)/(15)\text{ hour}\approx0.067\text{ hour}`

Also, 1 hour = 60 minutes

Then,
`(1)/(15)\text{ hour}=(1)/(15)*60=4\text{ minutes}`

Hence, it will take 4 minutes to run from his home to the park, a distance of 0.8 km.