Question

an elevator descends into a mine shaft at the rate of 8 metre per minute if it starts is desending from 5 metre above the ground level how long will it take to reach - 195 metre

Answer 1

5 metre above ground level = 5 + 195
                                             = 200 m
                rate of descend = 8 m/min
    
  So, time to descend = distance/time
                                   = 200/8
                                   = 25
Ans: It will take 25 minutes to descend.