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7 January, 06:45

The average length of time that three lawn mowers operate on a given day is 930 minutes. none of the mowers operates for less than 900 minutes. what is the greatest possible length of time any of the mowers operates

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  1. 7 January, 09:01
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    Solution: average time that 3 lawn mowers operate = 930 min. on given day total time they take for a day = average time per day x quantity of lawn mowers this gives, 930 x 3 = 2790 minimum time that a lawn mower can operate = 900 min hence, minimum two mowers can operate at 900 min then third mower will take time, that will be, 2790 = ((2 x 900) + third mower time) that will give, 990 min. Hence, one of the mowers can operate for about 990 min.
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