On the German autobahn, the recommended speed is 130 kilometers per hour. Approximately what is this speed in feet per second?

A. 0.023 foot/second

B. 119.167 feet/second

C. 305.067 feet/second

D. 7150 feet/second

### 1 Answer | Add Yours

`1"ft"=0.3048"m"` (this is the definition of a foot) and since `1"m"=0.001"km"` we have

`1"ft"=0.0003048"km"=>1"km"=1/0.0003048"ft"`

Also `1"h"=3600"s"`

Now we have everything we need to calculate how many ft/s is 130 km/h.

`130"km/h"=130cdot (1/0.0003048"ft")/(3600"s")approx118.47477"ft/s"`

In the above line we've put `1/0.0003048"ft"` instead of 1km and 3600s instead of 1h.

**130km/h is approximately equal to 118.47477ft/s.**

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