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

Step-by-step 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 $\text{Time}=\dfrac{\text{Distance}}{\text{Speed}}$

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

$\text{Time}=\dfrac{0.8}{12}=\dfrac{1}{15}\text{ hour}\approx0.067\text{ hour}$

Also, 1 hour = 60 minutes

Then, $\dfrac{1}{15}\text{ hour}=\dfrac{1}{15}\times60=4\text{ minutes}$

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