Answer :
Answer:
It will take the elevator 30 minutes to descend to -145 meters from its starting position of 5 meters above ground level.
Step-by-step explanation:
To determine how long it will take for the elevator to descend to -145 meters, we need to calculate the time based on its speed and initial position.
Given:
- Initial position above ground level: 5 meters
- Target position (depth): -145 meters
- Rate of descent: 5 meters per minute
The elevator is descending into the mine, so the change in position is calculated as:
→ Change in position = Final position - Initial position
→ Change in position = -145 meters - 5 meter
→ Change in position = -150 meter
The speed of descent is 5 meters per minute. To find the time it takes to descend 150 meters (absolute value of the change in position):
→ Time = Change in position / Rae of descent
→ Time = 150 meters / 5 m/minute
→ Time = 30 minutes
Therefore, it will take the elevator 30 minutes to descend to -145 meters from its starting position of 5 meters above ground level.
I hope this answer is helpful.
1min = 5m
1/5 min = 1 m
-150 m = 150m / 5 = 30 min
in above question , - ve sign was just there to show the direction .
& ground level is always 0 m , then total bistance will be -150 m (- 145 below ground level and -5 because above ground level ) .