Question

in a 4 kilometer race, a runner completes the first kilometer in 5.9 minutes, the second kilometer in 6.2 minutes, the third kilometer in 6.3 minutes, and the final kilometer in 6 minutes. the average speed of the runner for the race is approximately

Answer 1

To find the average of data collected, add all of the measurements: 5.9+6.2+6.3+6= 12.2

Then, divide the total amount by the number of data collected which is 4: 12.2/4= 3.05

The average speed of the runner of the race is approximately 3.05 km/min

Feel free to ask me any other questions you might have :)

Answer 2

Answer:

9.83 km/h

Explanation:

Given: in a 4 kilometer race, a runner completes the first kilometer in 5.9 minutes, the second kilometer in 6.2 minutes, the third kilometer in 6.3 minutes, and the final kilometer in 6 minutes.

To Find:  the average speed of the runner for the race.

Solution:

In a 4 kilometer race,

time required to travel first kilometer = $5.9$ $\text{minutes}$

time required to travel seoond kilometer = $6.2$ $\text{minutes}$

time required to travel third kilometer = $6.3$ $\text{minutes}$

time required to travel final kilometer = $6$ $\text{minutes}$

we know that,

$\text{Average speed}=\frac{\text{Total distance traveled}}{\text{Total time taken}}$

Total distance traveled = $4$  $\text{kilometer}$

Total time taken = $(5.9+6.2+6.3+6)$

                           =  $24.4$ $\text{minutes}$

                           = $\frac{24.4}{60}$  $\text{hours}$

putting values,

$\text{Average speed}=\frac{4}{\frac{24.4}{60}}$

 $\text{Average speed}=\frac{4\times60}{24.4}$

                                            =$9.83$ $\text{km}/ \text{h}$

the average speed of the runner for the race is approximately $9.83$ $\text{km}/ \text{h}$