Question

If a bike rider travels 15 miles in 30 hours what is his velocity if it is constant?

Answer 1

Velocity = displacement/time = 15/30 = 0.5miles/hr. 

Answer 2

0.8 km/hr ⇔ 0.22 m/s

Step-by-step explanation:

The formula for velocity is = distance/time

If velocity is to be calculated in kilometer per hour (km/hr)

The formula remains the same but the distance will be converted to kilometer (km) but the time remains in hour

Converting the distance to kilometers, we have

1 mile ⇒ 1.6 km

15 miles ⇒X km where X is the unknown

X =
`(15 * 1.6)/(1)` = 24 km

Velocity in km/hr = 24km/30 hr

Velocity = 0.8 km/hr

If velocity is to be calculated in meters per second (m/s). The formula remains the same also but the mile will be converted to meters and the time will be converted from hours to secs

Distance in meters will be

1 mile ⇒ 1609.34 meters

15 miles ⇒ X meters where X is the unknown

X =
`(15 * 1609.34)/(1)` = 24140.1 m

The time in seconds is

1 hr ⇒ 3600 secs

30 hrs ⇒
`(30 * 3600)/(1)` = 108,000s

Velocity in m/s = 24140.1m/108000s = 0.22m/s