= 3.6 kmÂ hâ '1 -LRB- exactly -RRB- â 3.2808 feet per second -LRB- approximately -RRB- â 2.2369 miles per hour -LRB- approximately -RRB- â 1.9438 knots -LRB- approximately -RRB-
â â â â - 3.2808 â pieds par seconde -LRB- approximativement -RRB- â â â - 2.2369 â miles per hour -LRB- approximately -RRB- = â 3.6 â kmÂ hâ '1 -LRB- exactement -RRB-