Question

an elevator descends into a mine shaft at the rate of 10m per minute if the distance start from 30 m above the ground level how long will it take to reach 520 M below the ground level

Answer 1

Initially the elevator is 30 m above the ground
It has to go 520 m below the ground hence
total distance =30+520=550m

Time taken by elevator to descend 10 m is 1 minute
then time taken to descend 1 m =1/10 minute
now for 550 m
time needed
= 550m =550/10 = 55 minutes

Answer 2

Answer is 55 mins...