Calculate the time it takes to travel a certain distance in kilometres based on a speed of miles per hour.
time = distance ÷ speed
one one kilometre (km) = 0.621371192237334 miles (mi) one mile per hour (mi/hr) = 1.609344 kilometres per hour (km/hr)
How long will it take to drive 120 kilometres at a speed of 45 miles per hour?
First convert the kilometres to miles;
120 * 0.621371192237334 = 74.5645
120 kilometres equals 74.5645 miles
Divide the distance of 74.5645 miles by the speed of 45 miles per hour to get the time in hours;
74.5645 ÷ 45 = 1.65699
It will take 1.657 hours to travel the 120 kilometres at a speed of 45 miles per hour. 1 hr - 39 min - 25 sec