Question

The speed limit on some interstate highways is roughly 80 km/h. What is this in meters per second? How many miles per hour is this?

Answer 1

The speed limit of 80 km/h is approximately 22.2 meters per second and 49.7 miles per hour.

Step-by-step explanation:

The speed limit on some interstate highways is roughly 80 km/h. To convert this speed to meters per second, you divide by 3.6 (since 1 km/h is equal to about 0.27778 m/s). So, 80 km/h divided by 3.6 gives us approximately 22.2 m/s.

To convert the speed to miles per hour, you would use the conversion factor that 1 kilometer is approximately 0.621371 miles. Therefore, 80 km/h multiplied by 0.621371 gives us approximately 49.7 mi/h.

Answer 2

1) Speed in m/s equals 22.22 m/s.

2) Speed in miles per hour equals 49.712 mph.

Step-by-step explanation:

Since we know that in 1 kilometer there are 1000 meters and in 1 hour there are 3600 seconds hence we can write

`80km/h=(80* 1000m)/(3600s)=22.22m/s`

Now we know that 1 mile equals 1.609 kilometer hence we conclude that 1 kilometer equals
`(1)/(1.609)=0.6214`mile

Hence

`80km/h=(80* 0.6214miles)/(1h)=49.712mph`