Posted by **Connie** on Monday, October 10, 2011 at 5:01pm.

What is the sequence of conversion factors for units if you change from ft/sec. to km/hour?

Is it ft/sec x sec/min x min/hour x ft/m x km/m?

- Math -
**Steve**, Monday, October 10, 2011 at 5:35pm
No, you have an upside-down fraction

ft/sec x sec/min = ft/min

ft/min x min/hr = ft/hr

ft/hr x m/ft = m/hr <<<----

m/hr x km/m = km/hr

- Math -
**Anonymous**, Monday, October 10, 2011 at 5:40pm
1 in = 25.4 mm = 2.54 cm = 0.0254 m

1ft = 12 in

1ft = 12 * 0.0254

1 ft = 0.3048 m

1 km = 1000 m

1 ft = 0.3048 / 1000 = 0.0003048 km

1 h = 3600 s

1 s = 1 / 3600 h

1 ft / s= 0.0003048 / ( 1 / 3600 )

1 ft / s= 0.0003048 * 3600

1 ft / s = 1.09728 km / h

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