1. 40 ×18/5 =144 km/hr 2.0.6×18/5 =2.16 km/hr 1 m = 1/1000km.....(1) 1 hr = 60 s .......(2) on dividing 1 and 2 =60/1000=18/5 There to CONVERT m/s to km/hr multiply with 18/5 and to convert km/hr to m/ s multiply with 5/18 Hope that U understood....If u found this useful MARK me the brainliest.... For more ANSWERSFOLLOW me....