Distance cannot be expressed in time. If it could, then you'd be able to figure out how many minutes high your house is, and how many miles of sleep you had last night.
21 km/h
800 km per hour
1 hour = 3600 seconds 1 mile = 1.609344 km 1609 mi/hr * 1.609344 km/mi ~= 2589.43 km/h 2589.43 km/h / 3600 seconds/hr ~= 0.71929 km/s
77 kph
696km/320km x 4 = 8.7 hrs
502 miles is equal to approximately 808.8 kilometers.
1000 km/hrs
150 divided by 2.5 = 60 km/hour
312 MI/ 502 Km
45 min = 3/4 hrs4 km / (3/4 hrs) = 4*4 km/3 hrs = 5.33333... km/hrs
21 km/h
Azerbaijan - Baku 2457.8 miles / 3955.4 km / 5 hrs, 6 mins Burkina Faso - Ouagadougou 2701 miles / 4346.8 km / 5 hrs, 36 Cape Verde - Praia 2848.1 miles / 4583.6 km / 5 hrs, 55 mins Gambia - Banjul 2780.4 miles / 4474.5 km / 5 hrs, 46 minsGuinea Bissau - Bissau 2879.8 miles / 4634.6 km / 5 hrs, 59 minsIran - Tehran 2735.3 miles / 4402.1 km / 5 hrs, 41 minsIraq - Baghdad 2538 miles / 4084.6 km / 5 hrs, 16 mins Kuwait - Kuwait City 2888.1 miles / 4648 km / 5 hrs, 60 minsMali - Bamako 2721.3 miles / 4379.5 km / 5 hrs, 39 minsMauritania - Nouakchott 2449.3 miles / 3941.8 km / 5 hrs, 5 minsNiger - Niamey 2626.7 miles / 4227.3 km / 5 hrs, 27 minsPalau - Melekeok 7570.6 miles / 12183.7 km / 15 hrs, 43 minsSaint Pierre and Miquelon - Saint-Pierre 2490.3 miles / 4007.8 km / 5 hrs, 10 minsSenegal - Dakar 2722.8 miles / 4381.9 km / 5 hrs, 39 mins
#1; 10 km @ 40 kmph = 0.25 hrs 15 mins) #2; 10 km @ 60 kmph = 0.166666..... hrs 10 min #3; 10 km @ 20 kmph = 0.5 hrs 30 mins. Distance = 30 km Time = 0.25 + 0.16666... + 0.5 = 0.9166666... hrs Hence average speed is 30 km / 0.916666... = 32.7272... kmph 7272
4hr 48min = 4 + 48/60 hrs = 4.8 hrs 203 km in 4hr 48 min => 203 / 4.8 ~= 42.3 km in 1 hour About 42.3 km/h
40/5 = 8 km/hr
2*40 = 80 km
If you want the average speed, add all the distances, add all the times, then divide distance by time.