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There are 3,600 seconds in one hour. To find how many tenths of a second are in one hour, we multiply 3,600 seconds by 10 (as there are 10 tenths in a whole unit). Therefore, there are 36,000 tenths of a second in one hour.
6/10 of an hour is 36 minutes.
54 minutes makes 9/10 of an hour.
well if you divide 60 by 10 you get 6 then 6x7 that makes 42 so the answer is 42 minutes is seven tenths of a hour
0.3 x 60 = 18 minutes