nokia.maps.routing.RouteLeg () has two properties :- travelTime and length....

I want to know the unit in which length returns value (in meters or in foots.....?)
I want to know the unit in which travelTime returns value (in seconds or in minutes....?)

I tried to find
routing.Route.legs[0].travelTime for half kilometer on map.....
and I got 32 value for travelTime...

for routing.Route.legs[0].length i got 491
I dont know the unit of length or travelTime...!

I know travelTime & length depends on transport mode,traffic mode.....