an elevator descends into mine shaft at the rate of 6 m/ minutes if the descent Starts from 10 metre above the ground level, how long will it take to reach -3 50 metre?
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To reach -350 mts. it has to descend (10+350) mts.= 360 mts.
Given, Speed= 6mts./mins.
It will take (360÷6)= 60 mins. or 1hrs. to reach -350mts.
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