Question

Suppose we represent the distance above the ground by a puitive interer
and that below the ground by a negative integer, then awer the following:
An elevator descends into a mine shaft at the rate of 5 metre per minute What will
be its position after one hour?
If it begins to descend from 15 m above the ground, what will be its position after as
minutes?​

Answer 1

Answer:

Since, the elevator going down, so the distance covered by it will be represented by a negative integer.

Change in position of elevator in one minute = −5m.

Position of the elevator after 60 minutes = (−5)×60=−300 m  

i.e. 300 m below ground level.

Explanation: