Question

suppose we represent the distance above the ground by a positive integer and that below the ground represents negative integer then;
1) an evaluator desends in to a mini shaft at the rate 5 m per minute . what will be its position after 1 hour

Answer 1

as the position of elevator is not given we will consider it to be at ground level.
the speed of the elevator=5m /min
the distance covered =5×60=300m
as we are representing the distance below the ground by negative z.
so it is -300m.