Question

suppose we represent the distance above the group by a positive integer and that below the group by a negative integer then then answer the following
I) an elevator descends into a mine shaft at the rate of 5 meter per minute.
what be its position after 1 hour
ii) if it begins to descend from 15 metre above the ground what will be its position after minutes​

Answer 1

Answer:

1. after 1hour=5×60=300. It's position will be=15-300=-285=285m below the ground
2. second ans is in pic