A second is 1/3600th of an hour, or approximately .000278.
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A decimal is a representation of a number and is independent of the units used. Unless, you are asked to write a nanosecond as a decimal fraction of a second or an hour or whatever.
It is: 1/12 of an hour or 0.08'3' recurring '3' as a decimal
12 hour
120 metres per second There are 3,600 seconds in one hour 120*3,600 = 432,000 metres per hour = 432 kilometres per hour 1 mile = 1.609 kilometres 432/1.609 = 268.4897452 miles So 120 metres per second is 268.5 mph corrected to one decimal place.
0.25 hour