Calculate the time it takes to ride, walk, swim, or run a certain distance in kilometres based on a speed in feet per second.
time = distance ÷ speed
one kilometre (km) = 0.621371192237334 miles (mi) one kilometre (km) = 3280.83989501312 feet (ft) one hour (hr) = 3600 seconds (sec) one foot per second (ft/sec) = 0.3048 metres per second (m/sec)
How long will it take to run 10 kilometres at a speed of 4 feet per second?
First, convert the 10 kilometres to a distance in feet;
3280.83989501312 * 10 = 32808.3989501312
10 kilometres equal 32808.4 feet
Divide the distance of 32808.4 feet by the speed of 4 feet per second to get the time in seconds;
32808.4 ÷ 4 = 8202.0997375328
It will take 8202.1 seconds to travel the 10 kilometres at a speed of 4 feet per second.
Convert to decimal hours by dividing by 3600 ( there are 3600 seconds in one hour);
8202.1 ÷ 3600 = 2.2783610382035555555555555555556
The time in hours equals 2.27836 hr. 2 hr - 16 min - 42 sec