An elevator descends into a mine shaft at the rate of 6m/min. If the descent starts from 10m above the ground level how long will it take to reach -350m? 
  • a)
    4 hour 
  • b)
    2 hour 
  • c)
    3 hour 
  • d)
    1 hour 
Correct answer is option 'D'. Can you explain this answer?
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Teaching Question

By AMAN GUPTA · Sep 23, 2019 ·Teaching
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