Question

an elevator descends into a mine shaft at the rate of 6 m per minute if the descend starts from 10 m above the ground level long will it take to reach 350m

Answer 1

Total distance to go down=350+10=360mtrs
Speed =-10mtrs/sec.
So, time=d/s
          t=360m/ 6m/s
          t=60s Or 60 seconds
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