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74 hours.
9 hours and 30 minutes.
7 hours
The efficiency of the mechanical device is calculated by dividing the output work (230 J) by the input work (430 J) and multiplying by 100. Therefore, the efficiency percentage would be (230 J / 430 J) * 100 = 53.5%.
430 miles is a 5 hour and 32 minute
5.5
4 hours and 45 minutes.
6 hours.
3 hours.
It is 3:45.
5.5
13 hours and 40 minutes.