Question

if an elevator descends into a mine shaft at the rate of 5 metre per minute .if the descent starts from 10 m above the ground , how long will it take to reach - 440

Answer 1

Answer:

In the above question the distance descended is denoted by a negative integer

It is given in the question that,

Initial height = 10 m

Also,

Final depth = - 350 m

Therefore,

Total distance to be descended by the elevator = (-350) – (10)

= - 360 m

Also,

Time taken by the elevator to descend – 6m = 1 minute

Hence,

Time taken by the elevator to descend – 360 m =

= 60 minutes

= 1 hour