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

9.83 km/h

Step-by-step 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}`

=
`(24.4)/(60)`
`\text{hours}`

putting values,

`\text{Average speed}=(4)/((24.4)/(60))`

`\text{Average speed}=(4*60)/(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}`