An elevator descends into a mine shaft at the rate of 8m/min. If the descent start from 120?
above the ground level, how long will it take to reach 840? below the ground?
Answers
Answered by
0
Answer:
12455321566788888888
Answered by
0
Answer:
60 minutes
Step-by-step explanation:
Distance descended is denoted by a negative integer,
Initial height =+10 m
Final Depth =−350 m
Total distance to be descended by the elevator =(−350)−(+10)=−360 m
Given, the time is taken by the elevator to descend −6 m=1 minute
Thus, time taken by the elevator to descend −360 m=
(−6)
(−360)
------- [from the formula : speed=
time
distance
]
=60 minutes
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