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2. An elevator descends into a mine shaft at the rate of 8 m/min. If the descent starts from 10 m abovethe ground level, how long will it take to reach - 390 m, 3M |
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Answer» Answer: SEARCH for questions, posts and chapters Maths Bookmark An elevator descends into a mine shaft at the rate of 8 m/min. If the descend starts from 12 m above the GROUND LEVEL, how long will it take to reach −468 m? share Share Answer Correct OPTION is A 60 mins Total DISTANCE covered from A to C =12+468=480 m Speed =8 m/min Therefore, time = Speed Total distance covered
time= 8 480
=60 minutes. |
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